Fix some comments

Author: yannickcr

lib/rules/prop-types.js

@@ -259,7 +259,7 @@ module.exports = function(context) {
     },
 
     ObjectExpression: function(node) {
-      // Search for the displayName declaration
+      // Search for the proptypes declaration
       node.properties.forEach(function(property) {
         if (!isPropTypesDeclaration(property.key)) {
           return;

tests/lib/rules/sort-comp.js

@@ -61,7 +61,7 @@ eslintTester.addRuleTest('lib/rules/sort-comp', {
       jsx: true
     }
   }, {
-    // Must but a custom method in 'everything-else'
+    // Must put a custom method in 'everything-else'
     code: [
       'var Hello = React.createClass({',
       '  onClick: function() {},',