Ensure all lexer attributes are Arrays

bin/pygments-lexers

@@ -12,14 +12,14 @@ for name, aliases, filenames, mimetypes in get_all_lexers():
 
     print "  name: %s" % name
 
-    print "  aliases:"
+    print "  aliases: !ruby/array"
     for alias in aliases:
         print "  - %s" % alias
 
-    print "  filenames:"
+    print "  filenames: !ruby/array"
     for filename in filenames:
         print "  - %s" % filename
 
-    print "  mimetypes:"
+    print "  mimetypes: !ruby/array"
     for mimetype in mimetypes:
         print "  - %s" % mimetype