Documentation: move diff.wordRegex from config.txt to diff-config.txt

19299a8 (Documentation: Move diff.<driver>.* from config.txt to
diff-config.txt, 2011-04-07) moved the diff configuration options to
diff-config.txt, but forgot about diff.wordRegex, which was left
behind in config.txt.  Fix this.

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Acked-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/config.txt

@@ -962,12 +962,6 @@ difftool.<tool>.cmd::
 difftool.prompt::
 	Prompt before each invocation of the diff tool.
 
-diff.wordRegex::
-	A POSIX Extended Regular Expression used to determine what is a "word"
-	when performing word-by-word difference calculations.  Character
-	sequences that match the regular expression are "words", all other
-	characters are *ignorable* whitespace.
-
 fetch.recurseSubmodules::
 	This option can be either set to a boolean value or to 'on-demand'.
 	Setting it to a boolean changes the behavior of fetch and pull to

Documentation/diff-config.txt

@@ -103,6 +103,12 @@ diff.suppressBlankEmpty::
 	A boolean to inhibit the standard behavior of printing a space
 	before each empty output line. Defaults to false.
 
+diff.wordRegex::
+	A POSIX Extended Regular Expression used to determine what is a "word"
+	when performing word-by-word difference calculations.  Character
+	sequences that match the regular expression are "words", all other
+	characters are *ignorable* whitespace.
+
 diff.<driver>.command::
 	The custom diff driver command.  See linkgit:gitattributes[5]
 	for details.