Relevance fixes for highlightjs#436:

- reset relevance of %-comments in Erlang
- added relevance booster for dots at the end of line in Erlang
- reset high relevance for %-strings in Ruby (it's rare anyway)
- specialized the simple `{..}` variant of MatLab cells to have zero relevance

src/languages/erlang.js

@@ -17,8 +17,7 @@ function(hljs) {
 
   var COMMENT = {
     className: 'comment',
-    begin: '%', end: '$',
-    relevance: 0
+    begin: '%', end: '$'
   };
   var NUMBER = {
     className: 'number',
@@ -154,7 +153,8 @@ function(hljs) {
       hljs.QUOTE_STRING_MODE,
       RECORD_ACCESS,
       VAR1, VAR2,
-      TUPLE
+      TUPLE,
+      {begin: /\.$/} // relevance booster
     ]
   };
 }

src/languages/matlab.js

@@ -65,9 +65,13 @@ function(hljs) {
       },
       {
         className: 'cell',
-        begin: '\\{', end: '\\}\'*[\\.\']*',
+        begin: '\\{',
         contains: COMMON_CONTAINS,
-        illegal: /:/
+        illegal: /:/,
+        variants: [
+          {end: /\}'[\.']*/},
+          {end: /\}/, relevance: 0}
+        ]
       },
       {
         className: 'comment',

src/languages/ruby.js

@@ -45,26 +45,11 @@ function(hljs) {
       {begin: '%[qw]?\\(', end: '\\)'},
       {begin: '%[qw]?\\[', end: '\\]'},
       {begin: '%[qw]?{', end: '}'},
-      {
-        begin: '%[qw]?<', end: '>',
-        relevance: 10
-      },
-      {
-        begin: '%[qw]?/', end: '/',
-        relevance: 10
-      },
-      {
-        begin: '%[qw]?%', end: '%',
-        relevance: 10
-      },
-      {
-        begin: '%[qw]?-', end: '-',
-        relevance: 10
-      },
-      {
-        begin: '%[qw]?\\|', end: '\\|',
-        relevance: 10
-      },
+      {begin: '%[qw]?<', end: '>'},
+      {begin: '%[qw]?/', end: '/'},
+      {begin: '%[qw]?%', end: '%'},
+      {begin: '%[qw]?-', end: '-'},
+      {begin: '%[qw]?\\|', end: '\\|'},
       {
         // \B in the beginning suppresses recognition of ?-sequences where ?
         // is the last character of a preceding identifier, as in: `func?4`