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/scala-mode/for.multi

@@ -1,5 +1,5 @@
-#Author : Jonas Bonèr <jonas@jonasboner.com>
-#name : for {x <- xs \ y <- ys} { yield }
+# Author: Jonas Bonèr <jonas@jonasboner.com>
+# name: for {x <- xs \ y <- ys} { yield }
 # key: for
 # --
 for {