Add support for combining diacritical marks for symbols.

lodash.js

@@ -163,7 +163,8 @@
 
   /** Used to compose unicode character classes. */
   var rsAstralRange = '\\ud800-\\udfff',
-      rsComboRange = '\\u0300-\\u036f\\ufe20-\\ufe23',
+      rsComboMarksRange = '\\u0300-\\u036f\\ufe20-\\ufe23',
+      rsComboSymbolsRange = '\\u20d0-\\u20f0',
       rsDingbatRange = '\\u2700-\\u27bf',
       rsLowerRange = 'a-z\\xdf-\\xf6\\xf8-\\xff',
       rsMathOpRange = '\\xac\\xb1\\xd7\\xf7',
@@ -177,12 +178,13 @@
   /** Used to compose unicode capture groups. */
   var rsAstral = '[' + rsAstralRange + ']',
       rsBreak = '[' + rsBreakRange + ']',
-      rsCombo = '[' + rsComboRange + ']',
+      rsCombo = '[' + rsComboMarksRange + rsComboSymbolsRange + ']',
       rsDigits = '\\d+',
       rsDingbat = '[' + rsDingbatRange + ']',
       rsLower = '[' + rsLowerRange + ']',
       rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']',
-      rsModifier = '(?:\\ud83c[\\udffb-\\udfff])',
+      rsFitz = '\\ud83c[\\udffb-\\udfff]',
+      rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
       rsNonAstral = '[^' + rsAstralRange + ']',
       rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
       rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
@@ -199,14 +201,17 @@
       rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq,
       rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';
 
-  /** Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks). */
+  /**
+   * Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and
+   * [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols).
+   */
   var reComboMark = RegExp(rsCombo, 'g');
 
   /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
-  var reComplexSymbol = RegExp(rsSymbol + rsSeq, 'g');
+  var reComplexSymbol = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
 
   /** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
-  var reHasComplexSymbol = RegExp('[' + rsZWJ + rsAstralRange + rsComboRange + rsVarRange + ']');
+  var reHasComplexSymbol = RegExp('[' + rsZWJ + rsAstralRange  + rsComboMarksRange + rsComboSymbolsRange + rsVarRange + ']');
 
   /** Used to match non-compound words composed of alphanumeric characters. */
   var reBasicWord = /[a-zA-Z0-9]+/g;