Improve display of tex-verbatim and Info quoted

Problem reported by Glenn Morris (Bug#19889).
* doc/emacs/display.texi (Standard Faces):
* doc/lispref/display.texi (Basic Faces):
* etc/NEWS: Mention fixed-pitch-serif.
* lisp/faces.el (face-font-family-alternatives):
New family alias Monospace Serif.
(fixed-pitch-serif): New face, which uses the new family.
* lisp/info.el (Info-quoted):
* lisp/textmodes/tex-mode.el (tex-verbatim): Use the new face.
* test/lisp/legacy/font-parse-tests.el (font-parse-tests--data):
Add test case for Monospace Serif.

This is backport from master
(cherry picked from commit 36906806ccfc0e53f1d8c365ab0d7151288b7833)

2 files changed, 4 insertions, 0 deletions

diff --git a/doc/emacs/display.texi b/doc/emacs/display.texi
index 56b643becf2..391e1a0ed58 100644
--- a/doc/emacs/display.texi
+++ b/doc/emacs/display.texi
@@ -613,6 +613,9 @@ This face underlines text.
 This face forces use of a fixed-width font.  It's reasonable to
 customize this face to use a different fixed-width font, if you like,
 but you should not make it a variable-width font.
+@item fixed-pitch-serif
+This face is like @code{fixed-pitch}, except the font has serifs and
+looks more like traditional typewriting.
 @cindex variable-pitch face
 @item variable-pitch
 This face forces use of a variable-width font.
diff --git a/doc/lispref/display.texi b/doc/lispref/display.texi
index 68b48e0df91..2e316f8a532 100644
--- a/doc/lispref/display.texi
+++ b/doc/lispref/display.texi
@@ -3027,6 +3027,7 @@ attribute on this face (@pxref{Face Attributes}).
 @itemx bold-italic
 @itemx underline
 @itemx fixed-pitch
+@itemx fixed-pitch-serif
 @itemx variable-pitch
 These have the attributes indicated by their names (e.g., @code{bold}
 has a bold @code{:weight} attribute), with all other attributes