Prevent the latter part of hyphenated terms from being identified as attributes.

mode/shell/shell.js

@@ -57,7 +57,7 @@ CodeMirror.defineMode('shell', function() {
         return 'number';
       }
     }
-    stream.eatWhile(/\w/);
+    stream.eatWhile(/[\w-]/);
     var cur = stream.current();
     if (stream.peek() === '=' && /\w+/.test(cur)) return 'def';
     return words.hasOwnProperty(cur) ? words[cur] : null;