Doc update on unmatched parentheses in regexps.

1 files changed, 5 insertions, 0 deletions

diff --git a/doc/gawktexi.in b/doc/gawktexi.in
index 38fa95e5..0aaff3e4 100644
--- a/doc/gawktexi.in
+++ b/doc/gawktexi.in
@@ -5520,6 +5520,11 @@ containing the alternation operator, @samp{|}.  For example,
 (These are Texinfo formatting control sequences. The @samp{+} is
 explained further on in this list.)
 
+The left or opening parenthesis is always a metacharacter; to match
+one literally, precede it with a backslash. However, the right or
+closing parenthesis is only special when paired with a left parenthesis;
+an unpaired right parenthesis is (silently) treated as a regular character.
+
 @cindex @code{*} (asterisk), @code{*} operator, as regexp operator
 @cindex asterisk (@code{*}), @code{*} operator, as regexp operator
 @item @code{*}