grep branch, master, updated. v2.21-20-g5f8579d

[Paul Eggert]

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http://git.savannah.gnu.org/cgit/grep.git/commit/?id=5f8579d37290a67359f54f020092635f33228e5f


commit 5f8579d37290a67359f54f020092635f33228e5f
Author: Paul Eggert <address@hidden>
Date:   Wed Mar 11 10:59:27 2015 -0700

    doc: clarify how -a matches
    
    * doc/grep.in.1, doc/grep.texi (File and Directory Selection):
    Give an example of how non-text bytes affect pattern matching in
    binary files.
    Fixes: bug#20080

diff --git a/doc/grep.in.1 b/doc/grep.in.1
index dfd8288..2b513a8 100644
--- a/doc/grep.in.1
+++ b/doc/grep.in.1
@@ -383,6 +383,12 @@ is
 processes a binary file as if it were text; this is equivalent to the
 .B \-a
 option.
+When processing binary data,
+.B grep
+may treat non-text bytes as line terminators; for example, the pattern
+.RB ' . '\&
+(period) might not match a null byte, as the null byte might be
+treated as a line terminator.
 .I Warning:
 .B "grep \-\^\-binary\-files=text"
 might output binary garbage,
diff --git a/doc/grep.texi b/doc/grep.texi
index 7738677..18a1102 100644
--- a/doc/grep.texi
+++ b/doc/grep.texi
@@ -605,8 +605,10 @@ By default, @var{type} is @samp{binary},
 and @command{grep} normally outputs either
 a one-line message saying that a binary file matches,
 or no message if there is no match.
-When matching binary data, @command{grep} may treat non-text
-bytes as line terminators.
+When processing binary data, @command{grep} may treat non-text bytes
+as line terminators; for example, the pattern @samp{.} (period) might
+not match a null byte, as the null byte might be treated as a line
+terminator even without the @option{-z} (@option{--null-data}) option.
 
 If @var{type} is @samp{without-match},
 @command{grep} assumes that a binary file does not match;

-----------------------------------------------------------------------

Summary of changes:
 doc/grep.in.1 |    6 ++++++
 doc/grep.texi |    6 ++++--
 2 files changed, 10 insertions(+), 2 deletions(-)


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