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Changes to grep/manual/html_node/Matching-Control.html,v

From: Jim Meyering
Subject: Changes to grep/manual/html_node/Matching-Control.html,v
Date: Sun, 30 Dec 2018 01:24:24 -0500 (EST)

CVSROOT:        /webcvs/grep
Module name:    grep
Changes by:     Jim Meyering <meyering> 18/12/30 01:24:22

Index: html_node/Matching-Control.html
RCS file: /webcvs/grep/grep/manual/html_node/Matching-Control.html,v
retrieving revision 1.28
retrieving revision 1.29
diff -u -b -r1.28 -r1.29
--- html_node/Matching-Control.html     10 Feb 2017 04:43:38 -0000      1.28
+++ html_node/Matching-Control.html     30 Dec 2018 06:24:22 -0000      1.29
@@ -2,7 +2,7 @@
 <!-- This manual is for grep, a pattern matching engine.
-Copyright (C) 1999-2002, 2005, 2008-2017 Free Software Foundation,
+Copyright (C) 1999-2002, 2005, 2008-2018 Free Software Foundation,
 Permission is granted to copy, distribute and/or modify this document
@@ -11,16 +11,16 @@
 Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
 Texts.  A copy of the license is included in the section entitled
 "GNU Free Documentation License". -->
-<!-- Created by GNU Texinfo 6.3, -->
+<!-- Created by GNU Texinfo 6.5, -->
-<title>GNU Grep 3.0: Matching Control</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Matching Control (GNU Grep 3.3)</title>
-<meta name="description" content="GNU Grep 3.0: Matching Control">
-<meta name="keywords" content="GNU Grep 3.0: Matching Control">
+<meta name="description" content="Matching Control (GNU Grep 3.3)">
+<meta name="keywords" content="Matching Control (GNU Grep 3.3)">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="index.html#Top" rel="start" title="Top">
 <link href="Index.html#Index" rel="index" title="Index">
 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
@@ -70,12 +70,13 @@
 <h4 class="subsection">2.1.2 Matching Control</h4>
 <dl compact="compact">
-<dt><samp>-e <var>pattern</var></samp></dt>
+<dt><samp>-e <var>patterns</var></samp></dt>
 <dd><a name="index-_002de"></a>
-<a name="index-_002d_002dregexp_003dpattern"></a>
-<a name="index-pattern-list"></a>
-<p>Use <var>pattern</var> as the pattern.
+<a name="index-_002d_002dregexp_003dpatterns"></a>
+<a name="index-patterns-option"></a>
+<p>Use <var>patterns</var> as one or more patterns; newlines within
+<var>patterns</var> separate each pattern from the next.
 If this option is used multiple times or is combined with the
 <samp>-f</samp> (<samp>--file</samp>) option, search for all patterns given.
 (<samp>-e</samp> is specified by POSIX.)
@@ -85,7 +86,7 @@
 <dd><a name="index-_002df"></a>
 <a name="index-_002d_002dfile"></a>
-<a name="index-pattern-from-file"></a>
+<a name="index-patterns-from-file"></a>
 <p>Obtain patterns from <var>file</var>, one per line.
 If this option is used multiple times or is combined with the
 <samp>-e</samp> (<samp>--regexp</samp>) option, search for all patterns given.
@@ -139,9 +140,16 @@
 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 <samp>-x</samp> is also specified.
+<p>Because the <samp>-w</samp> option can match a substring that does not
+begin and end with word constituents, it differs from surrounding a
+regular expression with &lsquo;<samp>\&lt;</samp>&rsquo; and 
&lsquo;<samp>\&gt;</samp>&rsquo;.  For example, although
+&lsquo;<samp>grep -w @</samp>&rsquo; matches a line containing only 
&lsquo;<samp>@</samp>&rsquo;, &lsquo;<samp>grep
+'\&lt;@\&gt;'</samp>&rsquo; cannot match any line because 
&lsquo;<samp>@</samp>&rsquo; is not a
+word constituent.  See <a 
 Backslash Character and Special Expressions</a>.
@@ -149,7 +157,7 @@
 <a name="index-_002d_002dline_002dregexp"></a>
 <a name="index-match-the-whole-line"></a>
 <p>Select only those matches that exactly match the whole line.
-For a regular expression pattern, this is like parenthesizing the
+For regular expression patterns, this is like parenthesizing each
 pattern and then surrounding it with &lsquo;<samp>^</samp>&rsquo; and 
 (<samp>-x</samp> is specified by POSIX.)

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