update test comments to be consistent

Author: erik-krogh

javascript/ql/test/query-tests/Security/CWE-022/TaintedPath/TaintedPath.js

@@ -36,11 +36,11 @@ var server = http.createServer(function(req, res) {
   res.write(fs.readFileSync(path)); // GOOD: Path is sanitized
 
   path = url.parse(req.url, true).query.path;
-  // BAD: taint is preserved [INCONSISTENCY]
+  // GOOD: basename is safe
   res.write(fs.readFileSync(pathModule.basename(path)));
   // BAD: taint is preserved
   res.write(fs.readFileSync(pathModule.dirname(path)));
-  // BAD: taint is preserved [INCONSISTENCY]
+  // GOOD: extname is safe
   res.write(fs.readFileSync(pathModule.extname(path)));
   // BAD: taint is preserved
   res.write(fs.readFileSync(pathModule.join(path)));