Keep snippet vars definitions in a single format across all snippets and documentation.

The format is:

# var-name: value

Previously snippets used a mixture of the following formatting:

#var-name: value
#var-name : value
# var-name: value
# var-name : value

snippets/emacs-lisp-mode/defun.yasnippet

@@ -1,7 +1,7 @@
-#contributor: Xah Lee (XahLee.org)
-#name: defun
-#key: defun
-#key: d
+# contributor: Xah Lee (XahLee.org)
+# name: defun
+# key: defun
+# key: d
 # --
 (defun $1 ()
   "DOCSTRING"