minor fixes

.gitignore

@@ -1,7 +1,6 @@
 node_modules/
 out/
 test*.js
-.idea/
 
 # lockfiles we don't use are ignored
 npm-shrinkwrap.json

spec.html

@@ -13870,7 +13870,7 @@ <h1>Keywords and Reserved Words</h1>
           <p>Those that are contextually disallowed as identifiers, in strict mode code: `let`, `static`, `implements`, `interface`, `package`, `private`, `protected`, and `public`;</p>
         </li>
         <li>
-          <p>Those that are always allowed as identifiers, but also appear as keywords within certain syntactic productions, at places where |Identifier| is not allowed: `as`, `async`, `from`, `get`, `of`, `set`, `meta`, and `target`.</p>
+          <p>Those that are always allowed as identifiers, but also appear as keywords within certain syntactic productions, at places where |Identifier| is not allowed: `as`, `async`, `from`, `get`, `meta`, `of`, `set`, and `target`.</p>
         </li>
       </ul>
       <p>The term <dfn>conditional keyword</dfn>, or <dfn>contextual keyword</dfn>, is sometimes used to refer to the keywords that fall in the last three categories, and thus can be used as identifiers in some contexts and as keywords in others.</p>