grep branch, master, updated. v3.1-3-gcdd82eb

[Paul Eggert]

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http://git.savannah.gnu.org/cgit/grep.git/commit/?id=cdd82ebbebe0113d0d252b385cc84e80d8ceac3a


commit cdd82ebbebe0113d0d252b385cc84e80d8ceac3a
Author: Paul Eggert <address@hidden>
Date:   Tue Jul 25 00:55:01 2017 -0700

    doc: distinguish -w from \<...\>
    
    * doc/grep.texi (Matching Control):
    Give example of why -w differs from \<...\> (Bug#27813).

diff --git a/doc/grep.texi b/doc/grep.texi
index 64df316..24800c9 100644
--- a/doc/grep.texi
+++ b/doc/grep.texi
@@ -235,9 +235,17 @@ or preceded by a non-word constituent character.
 Similarly,
 it must be either at the end of the line
 or followed by a non-word constituent character.
-Word-constituent characters are letters, digits, and the underscore.
+Word constituent characters are letters, digits, and the underscore.
 This option has no effect if @option{-x} is also specified.
 
+Because the @option{-w} option can match a substring that does not
+begin and end with word constituents, it differs from surrounding a
+pattern with @samp{\<} and @samp{\>}.  For example, although
address@hidden -w @@} matches a line containing only @samp{@@}, @samp{grep
+'\<@@\>'} cannot match any line because @samp{@@} is not a
+word constituent.  @xref{The Backslash Character and Special
+Expressions}.
+
 @item -x
 @itemx --line-regexp
 @opindex -x

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Summary of changes:
 doc/grep.texi | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)


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