More accurate documentation of lax whitespace matching

* lisp/isearch.el (isearch-forward-word, isearch-forward-symbol)
(word-search-backward, word-search-forward)
(word-search-backward-lax, word-search-forward-lax): Mention in
doc strings that toggling lax whitespace matching has no effect on
these commands.

* doc/emacs/search.texi (Word Search, Symbol Search): Clarify that
lax whitespace matching has no effect on these commands.

2 files changed, 18 insertions, 10 deletions

diff --git a/doc/emacs/search.texi b/doc/emacs/search.texi
index 81b4f87462e..d377dda0789 100644
--- a/doc/emacs/search.texi
+++ b/doc/emacs/search.texi
@@ -610,8 +610,9 @@ so that the matching can proceed incrementally as you type.  This
 additional laxity does not apply to the lazy highlight
 (@pxref{Incremental Search}), which always matches whole words.
 
-  The word search commands don't perform character folding and cannot
-support lax whitespace matching (@pxref{Lax Search}).
+  The word search commands don't perform character folding, and
+toggling lax whitespace matching (@pxref{Lax Search, lax space
+matching}) has no effect on them.
 
 @kindex M-s M-w
 @findex eww-search-word
@@ -669,8 +670,9 @@ search.  In nonincremental symbol searches, the beginning and end of
 the search string are required to match the beginning and end of a
 symbol, respectively.
 
-  The symbol search commands don't perform character folding and
-cannot support lax whitespace matching (@pxref{Lax Search}).
+  The symbol search commands don't perform character folding, and
+toggling lax whitespace matching (@pxref{Lax Search, lax space
+matching}) has no effect on them.
 
 @node Regexp Search
 @section Regular Expression Search
diff --git a/lisp/isearch.el b/lisp/isearch.el
index 229121d55b1..8c98d36f4aa 100644
--- a/lisp/isearch.el
+++ b/lisp/isearch.el
@@ -785,7 +785,8 @@ With a prefix argument, do a regular string search instead.
 Like ordinary incremental search except that your input is treated
 as a sequence of words without regard to how the words are separated.
 See the command `isearch-forward' for more information.
-This command does not support character folding or lax space matching."
+This command does not support character folding, and lax space matching
+has no effect on it."
   (interactive "P\np")
   (isearch-mode t nil nil (not no-recursive-edit) (null not-word)))
 
@@ -795,7 +796,8 @@ The prefix argument is currently unused.
 Like ordinary incremental search except that your input is treated
 as a symbol surrounded by symbol boundary constructs \\_< and \\_>.
 See the command `isearch-forward' for more information.
-This command does not support character folding or lax space matching."
+This command does not support character folding, and lax space matching
+has no effect on it."
   (interactive "P\np")
   (isearch-mode t nil nil (not no-recursive-edit) 'isearch-symbol-regexp))
 
@@ -1625,7 +1627,8 @@ Optional fourth argument is repeat count--search for successive occurrences.
 Relies on the function `word-search-regexp' to convert a sequence
 of words in STRING to a regexp used to search words without regard
 to punctuation.
-This command does not support character folding or lax space matching."
+This command does not support character folding, and lax space matching
+has no effect on it."
   (interactive "sWord search backward: ")
   (re-search-backward (word-search-regexp string nil) bound noerror count))
 
@@ -1641,7 +1644,8 @@ Optional fourth argument is repeat count--search for successive occurrences.
 Relies on the function `word-search-regexp' to convert a sequence
 of words in STRING to a regexp used to search words without regard
 to punctuation.
-This command does not support character folding or lax space matching."
+This command does not support character folding, and lax space matching
+has no effect on it."
   (interactive "sWord search: ")
   (re-search-forward (word-search-regexp string nil) bound noerror count))
 
@@ -1661,7 +1665,8 @@ Optional fourth argument is repeat count--search for successive occurrences.
 Relies on the function `word-search-regexp' to convert a sequence
 of words in STRING to a regexp used to search words without regard
 to punctuation.
-This command does not support character folding or lax space matching."
+This command does not support character folding, and lax space matching
+has no effect on it."
   (interactive "sWord search backward: ")
   (re-search-backward (word-search-regexp string t) bound noerror count))
 
@@ -1681,7 +1686,8 @@ Optional fourth argument is repeat count--search for successive occurrences.
 Relies on the function `word-search-regexp' to convert a sequence
 of words in STRING to a regexp used to search words without regard
 to punctuation.
-This command does not support character folding or lax space matching."
+This command does not support character folding, and lax space matching
+has no effect on it."
   (interactive "sWord search: ")
   (re-search-forward (word-search-regexp string t) bound noerror count))