Ensure _.words detects compound words where an all caps word is next to a capitalized word. [closes #2163]

lodash.js

@@ -229,7 +229,7 @@
   ].join('|'), 'g');
 
   /** Used to detect strings that need a more robust regexp to match words. */
-  var reHasComplexWord = /[a-z][A-Z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/;
+  var reHasComplexWord = /[a-z][A-Z]|[A-Z]{2,}[a-z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/;
 
   /** Used to assign default `context` object properties. */
   var contextProps = [