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/throw

@@ -1,5 +1,5 @@
-#Author : Jonas Bonèr <jonas@jonasboner.com>
-#name : throw new Exception
+# Author: Jonas Bonèr <jonas@jonasboner.com>
+# name: throw new Exception
 # key: throw
 # --
 throw new ${1:Exception}(${2:msg}) $0