Add RegExp 'global' option to Russian grammar rules

Author: yuryleb

languages/grammar/ru.json

@@ -1,6 +1,6 @@
 {
     "meta": {
-        "regExpFlags": ""
+        "regExpFlags": "g"
     },
     "v5": {
         "accusative": [

test/grammar_test.js

@@ -489,6 +489,8 @@ tape.test('verify grammar files structure', function(assert) {
     Object.keys(languages.grammars).forEach((l) => {
         var grammar = languages.grammars[l];
 
+        assert.ok(grammar.meta.regExpFlags.includes('g'), l + ' grammar has "g" regexp option');
+
         assert.ok(grammar.v5, l + ' grammar has v5 version');
 
         Object.keys(grammar.v5).forEach((g) => {