compatibility.js in better-pdfjs-rails-1.6.422.0

- old
+ new

@@ -10,10 +10,12 @@
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+/* eslint strict: ["error", "function"] */
+/* eslint-disable no-extend-native */
 /* globals VBArray, PDFJS */
 
 (function compatibilityWrapper() {
   'use strict';
 
@@ -268,10 +270,10 @@
     }
     for (
       // initialize result and counters
       var bc = 0, bs, buffer, idx = 0, output = '';
       // get next character
-      buffer = input.charAt(idx++);
+      (buffer = input.charAt(idx++));
       // character found in table?
       // initialize bit storage and add its ascii value
       ~buffer && (bs = bc % 4 ? bs * 64 + buffer : buffer,
         // and if not first of each 4 characters,
         // convert the first 8 bits to one ascii character