Document Etags regexp char escape sequences.

2 files changed, 6 insertions, 0 deletions

diff --git a/etc/NEWS b/etc/NEWS
index 0240b33ca38..369529dede8 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -593,6 +593,9 @@ be used (only once) in place of a file name on the command line.  Etags
 will read from standard input and mark the produced tags as belonging to
 the file FILE.
 
+*** Regular expressions can use char escape sequences as in Gcc
+These are the escapes \a, \b, \d, \e, \f, \n, \r, \t, \v.
+
 +++
 ** The command line option --no-windows has been changed to
 --no-window-system.  The old one still works, but is deprecated.
diff --git a/etc/etags.1 b/etc/etags.1
index 26381e3b682..ffa937750bc 100644
--- a/etc/etags.1
+++ b/etc/etags.1
@@ -168,6 +168,9 @@ such that more characters than needed are unavoidably matched by
 \fItagregexp\fP, it may be useful to add a \fInameregexp\fP, to
 narrow down the tag scope.  \fBctags\fP ignores regexps without a
 \fInameregexp\fP.  The syntax of regexps is the same as in emacs.
+The following character escape sequences are supported:
+\\a, \\b, \\d, \\e, \\f, \\n, \\r, \\t, \\v.
+
 .br
 Here are some examples.  All the regexps are quoted to protect them
 from shell interpretation.