New file, syntax colouring for Texinfo files.

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4844 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

 2014-05-06  Benno Schulenberg  <bensberg@justemail.net>
 	* doc/texinfo/nano.texi: Let makeinfo figure out the node pointers.
+	* doc/syntax/texinfo.nanorc: New file, colouring for Texinfo files.
 
 2014-05-05  Benno Schulenberg  <bensberg@justemail.net>
 	* doc/man/nanorc.5: Give syntax highlighting its own section,

doc/syntax/texinfo.nanorc

+## Here is an example for Texinfo files.
+##
+syntax "texinfo" "\.texi$"
+header "^\\input texinfo"
+magic "Texinfo source text"
+
+# Command arguments, trailing and enclosed.
+color cyan "^@[a-z]+[[:space:]]+.*$"
+color brightmagenta "@[a-z]+\{.*\}"
+# Commands themselves.
+color yellow "@[a-z]+\{?" "\}"
+
+# Menu items.
+color brightred "^\*[[:space:]]+.*::.*$"
+
+# Comments.
+color green "@c[[:space:]]+.*$"
+
+# Trailing whitespace.
+color ,green "[[:space:]]+$"