Make ':extend' inherited from default spec unless overridden

* lisp/faces.el (face-spec-recalc): Handle the :extend attribute
specially and always inherit it from the default spec unless
overwritten in a theme (bug#37774).

* test/lisp/faces-tests.el (faces--test-data-dir): New variable.
(faces--test-extend-with-themes): Use test themes instead of ones
from etc/themes.  Update expected values.

* test/data/themes/faces-test-dark-theme.el: New file.

* test/data/themes/faces-test-light-theme.el: New file.

* doc/lispref/display.texi (Face Attributes):
Update the description of ':extend'.

* etc/NEWS: Update the entry for ':extend'.

* etc/themes/adwaita-theme.el:
* etc/themes/deeper-blue-theme.el:
* etc/themes/dichromacy-theme.el:
* etc/themes/leuven-theme.el:
* etc/themes/light-blue-theme.el:
* etc/themes/manoj-dark-theme.el:
* etc/themes/misterioso-theme.el:
* etc/themes/tango-dark-theme.el:
* etc/themes/tango-theme.el:
* etc/themes/tsdh-dark-theme.el:
* etc/themes/tsdh-light-theme.el:
* etc/themes/wheatgrass-theme.el:
* etc/themes/wombat-theme.el: Remove the now-redundant ':extend'
attribute in all the themes.

14 files changed, 74 insertions, 73 deletions

diff --git a/etc/NEWS b/etc/NEWS
index ade9fca7908..16b5176c24b 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -437,19 +437,20 @@ to 'completion-styles' or 'completion-category-overrides' to use it.
 ** The 'completion-common-part' face is now visible by default.
 
 +++
-** New face attribute ':extend' to control face extension at EOL.
-The new face attribute ':extend' controls whether to use the face for
+** New face attribute ':extend' to control face extension at EOL.  The
+new face attribute ':extend' controls whether to use the face for
 displaying the empty space beyond end of line (EOL) till the edge of
-the window.  By default, this attribute is non-nil only for 'region',
-'secondary-selection', 'hl-line' and some faces of Diff and Ediff
-modes; any other face that crosses end of line will not affect the
-display of the empty space at EOL.  This is to make Emacs behave more
-like other GUI applications with respect to displaying faces that
-cross line boundaries.
-
-Themes that redefine faces should add a non-nil ':extend' attribute to
-the above-mentioned faces, to keep the behavior of the default face
-definitions.
+the window.  By default, this attribute is non-nil only for a small
+number of faces, notably, 'region'; any other face that crosses end of
+line will not affect the display of the empty space at EOL.  This is
+to make Emacs behave more like other GUI applications with respect to
+displaying faces that cross line boundaries.
+
+This attribute behaves specially when theme definitions are applied:
+if the theme doesn't specify an explicit value for a face, the value
+from the original face definition is inherited.  Consequently, a theme
+generally shouldn't specify this attribute unless it has a good reason
+to do so.
 
 ** Connection-local variables
 
diff --git a/etc/themes/adwaita-theme.el b/etc/themes/adwaita-theme.el
index 3f29b9f061f..73ef7b6e9ee 100644
--- a/etc/themes/adwaita-theme.el
+++ b/etc/themes/adwaita-theme.el
@@ -39,7 +39,7 @@ default look of the Gnome 3 desktop.")
    `(header-line ((,class (:foreground "#CCCCCC" :background "black"))))
 
    `(minibuffer-prompt ((,class (:foreground "#0084C8" :bold t))))
-   `(region ((,class (:foreground unspecified :background "#C2D5E9" :extend t))))
+   `(region ((,class (:foreground unspecified :background "#C2D5E9"))))
    `(dired-header ((,class (:bold t :foreground "#0084C8"))))
    `(widget-button ((,class (:bold t :foreground "#0084C8"))))
 
@@ -96,7 +96,7 @@ default look of the Gnome 3 desktop.")
    `(gnus-cite-1 ((,class (:foreground "#00578E"))))
    `(gnus-cite-2 ((,class (:foreground "#0084C8"))))
 
-   `(diff-added ((,class (:bold t :foreground "#4E9A06" :extend t))))
-   `(diff-removed ((,class (:bold t :foreground "#F5666D" :extend t))))))
+   `(diff-added ((,class (:bold t :foreground "#4E9A06"))))
+   `(diff-removed ((,class (:bold t :foreground "#F5666D"))))))
 
 ;;; adwaita-theme.el  ends here
diff --git a/etc/themes/deeper-blue-theme.el b/etc/themes/deeper-blue-theme.el
index d50a641930a..d04a270ba5e 100644
--- a/etc/themes/deeper-blue-theme.el
+++ b/etc/themes/deeper-blue-theme.el
@@ -43,9 +43,9 @@
    ;; `(diff-added ((,class (nil))))
    ;; `(diff-changed ((,class (nil))))
    `(diff-context ((,class (:foreground "seashell4"))))
-   `(diff-file-header ((,class (:background "grey60" :extend t))))
+   `(diff-file-header ((,class (:background "grey60"))))
    `(diff-function ((,class (:inherit diff-header))))
-   `(diff-header ((,class (:background "grey45" :extend t))))
+   `(diff-header ((,class (:background "grey45"))))
    `(diff-hunk-header ((,class (:inherit diff-header))))
    `(diff-index ((,class (:inherit diff-file-header))))
    `(diff-indicator-added ((,class (:foreground "white" :background "darkolivegreen"))))
@@ -54,12 +54,12 @@
    `(diff-refine-change ((,class (:background "skyblue4"))))
    ;; `(diff-removed ((,class (nil))))
    `(dired-marked ((,class (:background "dodgerblue3" :foreground "white"))))
-   `(ediff-current-diff-A ((,class (:background "green4" :foreground "white" :extend t))))
-   `(ediff-current-diff-B ((,class (:background "darkorange3" :foreground "white" :extend t))))
-   `(ediff-even-diff-B ((,class (:background "Grey50" :foreground "White" :extend t))))
+   `(ediff-current-diff-A ((,class (:background "green4" :foreground "white"))))
+   `(ediff-current-diff-B ((,class (:background "darkorange3" :foreground "white"))))
+   `(ediff-even-diff-B ((,class (:background "Grey50" :foreground "White"))))
    `(ediff-fine-diff-A ((,class (:background "skyblue4" :foreground "white"))))
    `(ediff-fine-diff-B ((,class (:background "cyan4" :foreground "white"))))
-   `(ediff-odd-diff-A ((,class (:background "Grey50" :foreground "White" :extend t))))
+   `(ediff-odd-diff-A ((,class (:background "Grey50" :foreground "White"))))
    `(error ((,class (:foreground "red"))))
    `(flymake-errline ((,class (:background nil :underline "red"))))
    `(flymake-warnline ((,class (:background nil :underline "magenta3"))))
@@ -102,7 +102,7 @@
    `(outline-4 ((,class (:foreground "turquoise2"))))
    `(outline-5 ((,class (:foreground "aquamarine1"))))
    `(primary-selection ((,class (:background "blue3"))))
-   `(region ((,class (:background "#103050" :extend t))))
+   `(region ((,class (:background "#103050"))))
    `(show-paren-match-face ((,class (:background "dodgerblue1" :foreground "white"))))
    `(show-paren-mismatch-face ((,class (:background "red1" :foreground "white"))))
    `(success ((,class (:foreground "SeaGreen2"))))
diff --git a/etc/themes/dichromacy-theme.el b/etc/themes/dichromacy-theme.el
index d585752ea4c..b361fe5c509 100644
--- a/etc/themes/dichromacy-theme.el
+++ b/etc/themes/dichromacy-theme.el
@@ -46,8 +46,8 @@ Ansi-Color faces are included.")
    ;; Highlighting faces
    `(fringe ((,class (:background "#f7f7f7"))))
    `(highlight ((,class (:foreground ,blue :background "#e5e5e5"))))
-   `(region ((,class (:foreground unspecified :background ,yellow :extend t))))
-   `(secondary-selection ((,class (:background "#e5e5e5" :extend t))))
+   `(region ((,class (:foreground unspecified :background ,yellow))))
+   `(secondary-selection ((,class (:background "#e5e5e5"))))
    `(isearch ((,class (:foreground "white" :background ,vermillion))))
    `(lazy-highlight ((,class (:foreground "white" :background ,redpurple))))
    `(trailing-whitespace ((,class (:background ,vermillion))))
diff --git a/etc/themes/leuven-theme.el b/etc/themes/leuven-theme.el
index 677d91c5b74..d544f28da79 100644
--- a/etc/themes/leuven-theme.el
+++ b/etc/themes/leuven-theme.el
@@ -48,12 +48,12 @@ Semantic, and Ansi-Color faces are included -- and much more...")
       (code-block '(:foreground "#000088" :background "#FFFFE0"))
       (code-inline '(:foreground "#006400" :background "#FDFFF7"))
       (column '(:height 1.0 :weight normal :slant normal :underline nil :strike-through nil :foreground "#E6AD4F" :background "#FFF2DE"))
-      (diff-added '(:foreground "#008000" :background "#DDFFDD" :extend t))
+      (diff-added '(:foreground "#008000" :background "#DDFFDD"))
       (diff-changed '(:foreground "#0000FF" :background "#DDDDFF"))
-      (diff-header '(:foreground "#800000" :background "#FFFFAF" :extend t))
+      (diff-header '(:foreground "#800000" :background "#FFFFAF"))
       (diff-hunk-header '(:foreground "#990099" :background "#FFEEFF"))
       (diff-none '(:foreground "gray33"))
-      (diff-removed '(:foreground "#A60000" :background "#FFDDDD" :extend t))
+      (diff-removed '(:foreground "#A60000" :background "#FFDDDD"))
       (directory '(:weight bold :foreground "blue" :background "#FFFFD2"))
       (highlight-line '(:background "#FFFFD7")) ; #F5F5F5
       (highlight-line-gnus '(:background "#DAEAFC")) ; defined in `gnus-leuven.el'
@@ -76,7 +76,7 @@ Semantic, and Ansi-Color faces are included -- and much more...")
       (ol8 '(:height 1.0 :weight bold :slant italic :foreground "#FD8008"))
       (paren-matched '(:background "#99CCFF"))
       (paren-unmatched '(:underline "red" :foreground nil :background "#FFDCDC"))
-      (region '(:background "#ABDFFA" :extend t))
+      (region '(:background "#ABDFFA"))
       (shadow '(:foreground "#7F7F7F"))
       (string '(:foreground "#008000")) ; or #D0372D
       (subject '(:family "Sans Serif" :weight bold :foreground "black"))
@@ -243,15 +243,15 @@ Semantic, and Ansi-Color faces are included -- and much more...")
    `(smerge-refined-change ((,class (:background "#AAAAFF"))))
 
    ;; Ediff
-   `(ediff-current-diff-A ((,class (:foreground "gray33" :background "#FFDDDD" :extend t))))
-   `(ediff-current-diff-B ((,class (:foreground "gray33" :background "#DDFFDD" :extend t))))
-   `(ediff-current-diff-C ((,class (:foreground "black" :background "cyan" :extend t))))
-   `(ediff-even-diff-A ((,class (:foreground "black" :background "light grey" :extend t))))
-   `(ediff-even-diff-B ((,class (:foreground "black" :background "light grey" :extend t))))
+   `(ediff-current-diff-A ((,class (:foreground "gray33" :background "#FFDDDD"))))
+   `(ediff-current-diff-B ((,class (:foreground "gray33" :background "#DDFFDD"))))
+   `(ediff-current-diff-C ((,class (:foreground "black" :background "cyan"))))
+   `(ediff-even-diff-A ((,class (:foreground "black" :background "light grey"))))
+   `(ediff-even-diff-B ((,class (:foreground "black" :background "light grey"))))
    `(ediff-fine-diff-A ((,class (:foreground "#A60000" :background "#FFAAAA"))))
    `(ediff-fine-diff-B ((,class (:foreground "#008000" :background "#55FF55"))))
-   `(ediff-odd-diff-A ((,class (:foreground "black" :background "light grey" :extend t))))
-   `(ediff-odd-diff-B ((,class (:foreground "black" :background "light grey" :extend t))))
+   `(ediff-odd-diff-A ((,class (:foreground "black" :background "light grey"))))
+   `(ediff-odd-diff-B ((,class (:foreground "black" :background "light grey"))))
 
    ;; Flyspell
 ;; (when (version< emacs-version "24.XXX")
@@ -462,7 +462,7 @@ Semantic, and Ansi-Color faces are included -- and much more...")
    `(info-xref-visited ((,class (:underline t :foreground "magenta4")))) ; previously visited cross-references
    `(light-symbol-face ((,class (:background "#FFFFA0"))))
    `(linum ((,class (:inherit (default shadow) :foreground "#9A9A9A" :background "#EDEDED"))))
-   `(log-view-file ((,class (:foreground "#0000CC" :background "#EAF2F5" :extend t))))
+   `(log-view-file ((,class (:foreground "#0000CC" :background "#EAF2F5"))))
    `(lui-button-face ((,class ,link)))
    `(lui-highlight-face ((,class (:box '(:line-width 1 :color "#CC0000") :foreground "#CC0000" :background "#FFFF88")))) ; my nickname
    `(lui-time-stamp-face ((,class (:foreground "purple"))))
diff --git a/etc/themes/light-blue-theme.el b/etc/themes/light-blue-theme.el
index e6d4a3a4b57..3060dcf09c7 100644
--- a/etc/themes/light-blue-theme.el
+++ b/etc/themes/light-blue-theme.el
@@ -36,8 +36,8 @@
    `(fringe ((,class (:background "gray85"))))
    ;; Highlighting faces
    `(highlight ((,class (:background "cyan"))))
-   `(region ((,class (:background "MediumAquamarine" :extend t))))
-   `(secondary-selection ((,class (:background "white" :foreground "black" :extend t))))
+   `(region ((,class (:background "MediumAquamarine"))))
+   `(secondary-selection ((,class (:background "white" :foreground "black"))))
    `(isearch ((,class (:background "green" :foreground "Black"))))
    `(lazy-highlight ((,class (:background "dark turquoise"))))
    `(query-replace ((,class (:inherit isearch :background "white" :foreground "black"))))
diff --git a/etc/themes/manoj-dark-theme.el b/etc/themes/manoj-dark-theme.el
index 1313caa3c6e..20e04cb7543 100644
--- a/etc/themes/manoj-dark-theme.el
+++ b/etc/themes/manoj-dark-theme.el
@@ -435,11 +435,11 @@ jarring angry fruit salad look to reduce eye fatigue.")
  '(diary-button ((t (:background "lightgrey" :foreground "black"  :box (:line-width 2 :style released-button)))))
  '(diary-face ((t (:foreground "IndianRed"))))
  '(diary-time ((t (:foreground "LightGoldenrod"))))
- '(diff-added ((t (:foreground "Green" :extend t))))
+ '(diff-added ((t (:foreground "Green"))))
  '(diff-added-face ((t (:foreground "Green"))))
  '(diff-changed-face ((t (:foreground "Khaki"))))
  '(diff-context-face ((t (:foreground "grey70"))))
- '(diff-file-header ((t (:bold t :background "grey20"  :foreground "ivory1" :weight bold :extend t))))
+ '(diff-file-header ((t (:bold t :background "grey20"  :foreground "ivory1" :weight bold))))
  '(diff-file-header-face ((t (:bold t :background "grey20" :foreground "ivory1" :weight bold))))
  '(diff-function-face ((t (:foreground "SpringGreen1"))))
  '(diff-header-face ((t (:background "SlateBlue4"))))
@@ -448,7 +448,7 @@ jarring angry fruit salad look to reduce eye fatigue.")
  '(diff-index-face ((t (:bold t :weight bold :background "SteelBlue4" :foreground "linen" ))))
  '(diff-nonexistent ((t (:bold t :weight bold :background "Black" :foreground "Wheat1"))))
  '(diff-nonexistent-face ((t (:bold t :weight bold :background "Black" :foreground "Wheat1"))))
- '(diff-removed ((t (:foreground "salmon1" :extend t))))
+ '(diff-removed ((t (:foreground "salmon1"))))
  '(diff-removed-face ((t (:foreground "salmon1"))))
  '(diff-refine-change-face ((t (:background "MidnightBlue"))))
  '(diff-refine-change      ((t (:background "MidnightBlue"))))
@@ -511,7 +511,7 @@ jarring angry fruit salad look to reduce eye fatigue.")
  '(header-line ((t (:box (:line-width -1 :color "grey20" :style released-button) :background "grey20" :foreground "grey90"  :height 0.9))))
  '(help-argument-name ((t (:italic t :slant italic))))
  '(highlight ((t (:background "gray10" :foreground "Old Lace"))))
- '(hl-line  ((t (:background "grey10" :foreground "Old Lace" :extend t))))
+ '(hl-line  ((t (:background "grey10" :foreground "Old Lace"))))
  '(gnus-mouse-face ((t (:background "darkseagreen2" :foreground "blue"))))
  '(erc-button-mouse-face ((t (:background "darkseagreen2" :foreground "blue"))))
  '(align-highlight-change-face  ((t (:background "darkseagreen2" :foreground "blue"))))
@@ -601,7 +601,7 @@ jarring angry fruit salad look to reduce eye fatigue.")
  '(paren-mismatch-face ((t (:bold t :background "white" :foreground "red"))))
  '(paren-no-match-face ((t (:bold t :background "white" :foreground "red"))))
  '(query-replace ((t (:foreground "brown4" :background "palevioletred2"))))
- '(region ((t (:background "blue3" :extend t))))
+ '(region ((t (:background "blue3"))))
  '(realgud-overlay-arrow1        ((t (:foreground "medium sea green"))))
  '(realgud-overlay-arrow2        ((t (:foreground "white"))))
  '(realgud-overlay-arrow3        ((t (:foreground "indian red"))))
@@ -613,7 +613,7 @@ jarring angry fruit salad look to reduce eye fatigue.")
  '(realgud-line-number           ((t (:foreground "yellow"))))
  '(realgud-backtrace-number      ((t (:foreground "yellow" :weight bold))))
  '(scroll-bar ((t (:background "grey75" :foreground "WhiteSmoke"))))
- '(secondary-selection ((t (:background "SkyBlue4" :extend t))))
+ '(secondary-selection ((t (:background "SkyBlue4"))))
  '(semantic-dirty-token-face ((t (:background "lightyellow"))))
  '(semantic-highlight-edits-face ((t (:background "gray20"))))
  '(semantic-unmatched-syntax-face ((t (:underline "red"))))
@@ -631,10 +631,10 @@ jarring angry fruit salad look to reduce eye fatigue.")
  '(show-paren-match ((t (:background "steelblue3"))))
  '(show-paren-match-face ((t (:background "steelblue3"))))
  '(show-paren-mismatch ((t (:background "purple" :foreground "white"))))
- '(smerge-base ((t (:foreground "orange" :extend t))))
- '(smerge-markers ((t (:background "grey30" :extend t))))
- '(smerge-mine ((t (:foreground "cyan" :extend t))))
- '(smerge-other ((t (:foreground "lightgreen" :extend t))))
+ '(smerge-base ((t (:foreground "orange"))))
+ '(smerge-markers ((t (:background "grey30"))))
+ '(smerge-mine ((t (:foreground "cyan"))))
+ '(smerge-other ((t (:foreground "lightgreen"))))
  '(smerge-refined-change ((t (:background "blue4"))))
  '(speedbar-button-face ((t (:foreground "green3"))))
  '(speedbar-directory-face ((t (:foreground "light blue"))))
diff --git a/etc/themes/misterioso-theme.el b/etc/themes/misterioso-theme.el
index c7e1dc983fb..727270c27f5 100644
--- a/etc/themes/misterioso-theme.el
+++ b/etc/themes/misterioso-theme.el
@@ -37,7 +37,7 @@
    ;; Highlighting faces
    `(fringe ((,class (:background "#2e3748"))))
    `(highlight ((,class (:background "#338f86" :foreground "#e1e1e0"))))
-   `(region ((,class (:background "#2d4948" :foreground "#e1e1e0" :extend t))))
+   `(region ((,class (:background "#2d4948" :foreground "#e1e1e0"))))
    `(isearch ((,class (:background "#fcffad" :foreground "#000000"))))
    `(lazy-highlight ((,class (:background "#338f86"))))
    `(trailing-whitespace ((,class (:background "#ff4242"))))
diff --git a/etc/themes/tango-dark-theme.el b/etc/themes/tango-dark-theme.el
index d2fdff8e091..91256208a3f 100644
--- a/etc/themes/tango-dark-theme.el
+++ b/etc/themes/tango-dark-theme.el
@@ -61,8 +61,8 @@ Semantic, and Ansi-Color faces are included.")
    ;; Highlighting faces
    `(fringe ((,class (:background ,alum-7))))
    `(highlight ((,class (:foreground ,alum-6 :background "#c0c000"))))
-   `(region ((,class (:background ,alum-5 :extend t))))
-   `(secondary-selection ((,class (:background ,blue-3 :extend t))))
+   `(region ((,class (:background ,alum-5))))
+   `(secondary-selection ((,class (:background ,blue-3))))
    `(isearch ((,class (:foreground ,alum-1 :background ,orange-3))))
    `(lazy-highlight ((,class (:background ,choc-3))))
    `(trailing-whitespace ((,class (:background ,red-3))))
@@ -130,14 +130,14 @@ Semantic, and Ansi-Color faces are included.")
    ;; SMerge faces
    `(smerge-refined-change ((,class (:background ,blue-3))))
    ;; Ediff faces
-   `(ediff-current-diff-A ((,class (:background ,alum-5 :extend t))))
+   `(ediff-current-diff-A ((,class (:background ,alum-5))))
    `(ediff-fine-diff-A ((,class (:background ,blue-3))))
-   `(ediff-even-diff-A ((,class (:background ,alum-5.5 :extend t))))
-   `(ediff-odd-diff-A ((,class (:background ,alum-5.5 :extend t))))
-   `(ediff-current-diff-B ((,class (:background ,alum-5 :extend t))))
+   `(ediff-even-diff-A ((,class (:background ,alum-5.5))))
+   `(ediff-odd-diff-A ((,class (:background ,alum-5.5))))
+   `(ediff-current-diff-B ((,class (:background ,alum-5))))
    `(ediff-fine-diff-B ((,class (:background ,choc-3))))
-   `(ediff-even-diff-B ((,class (:background ,alum-5.5 :extend t))))
-   `(ediff-odd-diff-B ((,class (:background ,alum-5.5 :extend t))))
+   `(ediff-even-diff-B ((,class (:background ,alum-5.5))))
+   `(ediff-odd-diff-B ((,class (:background ,alum-5.5))))
    ;; Flyspell faces
    `(flyspell-duplicate ((,class (:underline ,orange-1))))
    `(flyspell-incorrect ((,class (:underline ,red-1))))
diff --git a/etc/themes/tango-theme.el b/etc/themes/tango-theme.el
index c832192968a..12d4db3fe7c 100644
--- a/etc/themes/tango-theme.el
+++ b/etc/themes/tango-theme.el
@@ -53,8 +53,8 @@ Semantic, and Ansi-Color faces are included.")
    ;; Highlighting faces
    `(fringe ((,class (:background ,alum-2))))
    `(highlight ((,class (:background ,alum-3))))
-   `(region ((,class (:background ,alum-3 :extend t))))
-   `(secondary-selection ((,class (:background ,blue-0 :extend t))))
+   `(region ((,class (:background ,alum-3))))
+   `(secondary-selection ((,class (:background ,blue-0))))
    `(isearch ((,class (:foreground "#ffffff" :background ,orange-3))))
    `(lazy-highlight ((,class (:background ,choc-1))))
    `(trailing-whitespace ((,class (:background ,red-1))))
@@ -117,9 +117,9 @@ Semantic, and Ansi-Color faces are included.")
    ;; SMerge
    `(smerge-refined-change ((,class (:background ,plum-1))))
    ;; Ediff
-   `(ediff-current-diff-A ((,class (:background ,blue-1 :extend t))))
+   `(ediff-current-diff-A ((,class (:background ,blue-1))))
    `(ediff-fine-diff-A ((,class (:background ,plum-1))))
-   `(ediff-current-diff-B ((,class (:background ,butter-1 :extend t))))
+   `(ediff-current-diff-B ((,class (:background ,butter-1))))
    `(ediff-fine-diff-B ((,class (:background ,orange-1))))
    ;; Flyspell
    `(flyspell-duplicate ((,class (:underline ,orange-1))))
diff --git a/etc/themes/tsdh-dark-theme.el b/etc/themes/tsdh-dark-theme.el
index bd0564a21dc..5482ced6b29 100644
--- a/etc/themes/tsdh-dark-theme.el
+++ b/etc/themes/tsdh-dark-theme.el
@@ -26,12 +26,12 @@
  'tsdh-dark
  '(aw-leading-char-face ((t (:background "gray30" :foreground "red" :weight bold))))
  '(default ((t (:background "gray20" :foreground "white smoke"))))
- '(diff-added ((t (:inherit diff-changed :background "dark green" :extend t))) t)
+ '(diff-added ((t (:inherit diff-changed :background "dark green"))) t)
  '(diff-changed ((t (:background "midnight blue"))) t)
  '(diff-indicator-added ((t (:inherit diff-indicator-changed))) t)
  '(diff-indicator-changed ((t (:weight bold))) t)
  '(diff-indicator-removed ((t (:inherit diff-indicator-changed))) t)
- '(diff-removed ((t (:inherit diff-changed :background "dark red" :extend t))) t)
+ '(diff-removed ((t (:inherit diff-changed :background "dark red"))) t)
  '(dired-directory ((t (:foreground "DodgerBlue" :weight bold))))
  '(error ((t (:foreground "deep pink" :weight bold))))
  '(eshell-prompt ((t (:inherit font-lock-function-name-face :weight bold))))
@@ -69,7 +69,7 @@
  '(header-line ((t (:inverse-video t :box (:line-width -1 :color "red" :style released-button)))))
  '(helm-header ((t (:background "DeepSkyBlue4" :weight bold))))
  '(highlight ((t (:background "sea green"))))
- '(hl-line ((t (:background "grey25" :extend t))))
+ '(hl-line ((t (:background "grey25"))))
  '(hl-paren-face ((t (:weight bold))) t)
  '(icomplete-first-match ((t (:foreground "deep sky blue" :weight bold))))
  '(ido-first-match ((t (:foreground "turquoise" :weight bold))))
@@ -132,9 +132,9 @@
  '(rcirc-other-nick ((t (:foreground "dodger blue"))) t)
  '(rcirc-track-keyword ((t (:foreground "DodgerBlue" :weight bold))) t)
  '(rcirc-track-nick ((t (:background "yellow" :foreground "DodgerBlue" :weight bold))) t)
- '(region ((t (:background "SeaGreen4" :extend t))))
+ '(region ((t (:background "SeaGreen4"))))
  '(scroll-bar ((t (:background "gray20" :foreground "dark turquoise"))))
- '(secondary-selection ((t (:background "#333366" :foreground "#f6f3e8" :extend t))))
+ '(secondary-selection ((t (:background "#333366" :foreground "#f6f3e8"))))
  '(show-paren-match ((t (:background "DeepSkyBlue4"))))
  '(show-paren-mismatch ((t (:background "dark magenta"))))
  '(swiper-match-face-1 ((t (:background "gray35"))))
diff --git a/etc/themes/tsdh-light-theme.el b/etc/themes/tsdh-light-theme.el
index efc49c1a216..8e6a79f8e36 100644
--- a/etc/themes/tsdh-light-theme.el
+++ b/etc/themes/tsdh-light-theme.el
@@ -29,12 +29,12 @@ Used and created by Tassilo Horn.")
  '(Info-quoted ((t (:underline "gray40" :weight bold))))
  '(aw-leading-char-face ((t (:background "red" :foreground "white" :weight bold))))
  '(default ((t (:background "white" :foreground "black"))))
- '(diff-added ((t (:inherit diff-changed :background "light green" :extend t))))
+ '(diff-added ((t (:inherit diff-changed :background "light green"))))
  '(diff-changed ((t (:background "light steel blue"))))
  '(diff-indicator-added ((t (:inherit diff-indicator-changed))))
  '(diff-indicator-changed ((t (:weight bold))))
  '(diff-indicator-removed ((t (:inherit diff-indicator-changed))))
- '(diff-removed ((t (:inherit diff-changed :background "sandy brown" :extend t))))
+ '(diff-removed ((t (:inherit diff-changed :background "sandy brown"))))
  '(dired-directory ((t (:inherit font-lock-function-name-face :weight bold))))
  '(font-lock-builtin-face ((t (:foreground "#e44649"))))
  '(font-lock-comment-delimiter-face ((t (:inherit font-lock-comment-face :weight bold))))
@@ -62,7 +62,7 @@ Used and created by Tassilo Horn.")
  '(gnus-group-news-2-empty ((t (:foreground "tomato3"))))
  '(gnus-group-news-3 ((t (:inherit gnus-group-news-3-empty :weight bold))))
  '(gnus-group-news-3-empty ((t (:foreground "tomato2")))) '(header-line ((t (:inherit mode-line :inverse-video t))))
- '(hl-line ((t (:background "#f0f0f1" :extend t))))
+ '(hl-line ((t (:background "#f0f0f1"))))
  '(hl-paren-face ((t (:weight bold))) t)
  '(minibuffer-prompt ((t (:foreground "#0184bc" :box (:line-width -1 :style released-button) :weight bold))))
  '(mode-line ((t (:background "#f0f0f1" :box (:line-width 1 :color "#383a42")))))
diff --git a/etc/themes/wheatgrass-theme.el b/etc/themes/wheatgrass-theme.el
index 2628b68ff06..640343a33bc 100644
--- a/etc/themes/wheatgrass-theme.el
+++ b/etc/themes/wheatgrass-theme.el
@@ -40,8 +40,8 @@ of green, brown, and blue.")
    `(compilation-info ((,class (:foreground "ForestGreen"))))
    ;; Highlighting faces
    `(highlight ((,class (:foreground "white" :background "dark green"))))
-   `(region ((,class (:foreground "white" :background "dark green" :extend t))))
-   `(secondary-selection ((,class (:background "dark slate gray" :extend t))))
+   `(region ((,class (:foreground "white" :background "dark green"))))
+   `(secondary-selection ((,class (:background "dark slate gray"))))
    `(isearch ((,class (:foreground "white" :background "dark goldenrod"))))
    `(lazy-highlight ((,class (:background "gray25"))))
    ;; Font lock faces
diff --git a/etc/themes/wombat-theme.el b/etc/themes/wombat-theme.el
index 0a5e87ac585..c56700ffd9a 100644
--- a/etc/themes/wombat-theme.el
+++ b/etc/themes/wombat-theme.el
@@ -36,8 +36,8 @@ are included.")
    `(fringe ((,class (:background "#303030"))))
    `(highlight ((,class (:background "#454545" :foreground "#ffffff"
                          :underline t))))
-   `(region ((,class (:background "#444444" :foreground "#f6f3e8" :extend t))))
-   `(secondary-selection ((,class (:background "#333366" :foreground "#f6f3e8" :extend t))))
+   `(region ((,class (:background "#444444" :foreground "#f6f3e8"))))
+   `(secondary-selection ((,class (:background "#333366" :foreground "#f6f3e8"))))
    `(isearch ((,class (:background "#343434" :foreground "#857b6f"))))
    `(lazy-highlight ((,class (:background "#384048" :foreground "#a0a8b0"))))
    ;; Mode line faces