Updated runtime files.
diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
index 4bd181a..5a83260 100644
--- a/runtime/doc/syntax.txt
+++ b/runtime/doc/syntax.txt
@@ -1,4 +1,4 @@
-*syntax.txt* For Vim version 7.3. Last change: 2012 Mar 28
+*syntax.txt* For Vim version 7.3. Last change: 2012 Apr 05
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -2836,6 +2836,18 @@
By leaving one or more of these out, the associated conceal-character
substitution will not be made.
+ *g:tex_isk*
+ Tex: Controlling What's In A Keyword~
+
+(La)Tex keywords normally use the characters 0-9,a-z,A-Z,192-255 only
+but the "_" is the only one that causes problems. So, by default,
+syntax/tex.vim overrides the usual |'iskeyword'| setting (using |setlocal|)
+with one that works for LaTeX.
+
+However, one may override this iskeyword re-setting by setting the
+variable, g:tex_isk, in one's .vimrc to whatever one wishes and
+it will be used instead.
+
TF *tf.vim* *ft-tf-syntax*