add 'ref' for Sphinx

snippets/rst.snippets

@@ -86,6 +86,8 @@ snippet toc:
 		${0}
 snippet dow:
 	:download:`${0:text} <${1:path}>`
+snippet ref:
+	:ref:`${0:text} <${1:path}>`
 # CJK optimize, CJK has no space between charaters
 snippet *c
 	\ *${1:Emphasis}*\ ${0}