docs(input[text]): remove deprecated tt tag

Closes #14547

Author: Narretz

src/ng/directive/input.js

@@ -100,11 +100,11 @@ var inputType = {
              <span class="error" ng-show="myForm.input.$error.pattern">
                Single word only!</span>
            </div>
-           <tt>text = {{example.text}}</tt><br/>
-           <tt>myForm.input.$valid = {{myForm.input.$valid}}</tt><br/>
-           <tt>myForm.input.$error = {{myForm.input.$error}}</tt><br/>
-           <tt>myForm.$valid = {{myForm.$valid}}</tt><br/>
-           <tt>myForm.$error.required = {{!!myForm.$error.required}}</tt><br/>
+           <code>text = {{example.text}}</code><br/>
+           <code>myForm.input.$valid = {{myForm.input.$valid}}</code><br/>
+           <code>myForm.input.$error = {{myForm.input.$error}}</code><br/>
+           <code>myForm.$valid = {{myForm.$valid}}</code><br/>
+           <code>myForm.$error.required = {{!!myForm.$error.required}}</code><br/>
           </form>
         </file>
         <file name="protractor.js" type="protractor">