php: ran php-cs-fixer to comply with php coding standard
diff --git a/src/php/lib/Grpc/BidiStreamingCall.php b/src/php/lib/Grpc/BidiStreamingCall.php
index 60c0fb0..bf813c1 100644
--- a/src/php/lib/Grpc/BidiStreamingCall.php
+++ b/src/php/lib/Grpc/BidiStreamingCall.php
@@ -31,68 +31,87 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  */
+
 namespace Grpc;
 
 /**
  * Represents an active call that allows for sending and recieving messages in
  * streams in any order.
  */
-class BidiStreamingCall extends AbstractCall {
-  /**
-   * Start the call
-   * @param array $metadata Metadata to send with the call, if applicable
-   */
-  public function start($metadata = []) {
-    $this->call->startBatch([OP_SEND_INITIAL_METADATA => $metadata]);
-  }
-
-  /**
-   * Reads the next value from the server.
-   * @return The next value from the server, or null if there is none
-   */
-  public function read() {
-    $batch = [OP_RECV_MESSAGE => true];
-    if ($this->metadata === null) {
-      $batch[OP_RECV_INITIAL_METADATA] = true;
+class BidiStreamingCall extends AbstractCall
+{
+    /**
+     * Start the call.
+     *
+     * @param array $metadata Metadata to send with the call, if applicable
+     */
+    public function start($metadata = [])
+    {
+        $this->call->startBatch([
+            OP_SEND_INITIAL_METADATA => $metadata,
+        ]);
     }
-    $read_event = $this->call->startBatch($batch);
-    if ($this->metadata === null) {
-      $this->metadata = $read_event->metadata;
+
+    /**
+     * Reads the next value from the server.
+     *
+     * @return The next value from the server, or null if there is none
+     */
+    public function read()
+    {
+        $batch = [OP_RECV_MESSAGE => true];
+        if ($this->metadata === null) {
+            $batch[OP_RECV_INITIAL_METADATA] = true;
+        }
+        $read_event = $this->call->startBatch($batch);
+        if ($this->metadata === null) {
+            $this->metadata = $read_event->metadata;
+        }
+
+        return $this->deserializeResponse($read_event->message);
     }
-    return $this->deserializeResponse($read_event->message);
-  }
 
-  /**
-   * Write a single message to the server. This cannot be called after
-   * writesDone is called.
-   * @param ByteBuffer $data The data to write
-   * @param array $options an array of options, possible keys:
-   *              'flags' => a number
-   */
-  public function write($data, $options = []) {
-    $message_array = ['message' => $data->serialize()];
-    if (isset($options['flags'])) {
-      $message_array['flags'] = $options['flags'];
+    /**
+     * Write a single message to the server. This cannot be called after
+     * writesDone is called.
+     *
+     * @param ByteBuffer $data    The data to write
+     * @param array      $options an array of options, possible keys:
+     *                            'flags' => a number
+     */
+    public function write($data, $options = [])
+    {
+        $message_array = ['message' => $data->serialize()];
+        if (isset($options['flags'])) {
+            $message_array['flags'] = $options['flags'];
+        }
+        $this->call->startBatch([
+            OP_SEND_MESSAGE => $message_array,
+        ]);
     }
-    $this->call->startBatch([OP_SEND_MESSAGE => $message_array]);
-  }
 
-  /**
-   * Indicate that no more writes will be sent.
-   */
-  public function writesDone() {
-    $this->call->startBatch([OP_SEND_CLOSE_FROM_CLIENT => true]);
-  }
+    /**
+     * Indicate that no more writes will be sent.
+     */
+    public function writesDone()
+    {
+        $this->call->startBatch([
+            OP_SEND_CLOSE_FROM_CLIENT => true,
+        ]);
+    }
 
-  /**
-   * Wait for the server to send the status, and return it.
-   * @return object The status object, with integer $code, string $details,
-   *     and array $metadata members
-   */
-  public function getStatus() {
-    $status_event = $this->call->startBatch([
-        OP_RECV_STATUS_ON_CLIENT => true
-    ]);
-    return $status_event->status;
-  }
-}
\ No newline at end of file
+    /**
+     * Wait for the server to send the status, and return it.
+     *
+     * @return object The status object, with integer $code, string $details,
+     *                and array $metadata members
+     */
+    public function getStatus()
+    {
+        $status_event = $this->call->startBatch([
+            OP_RECV_STATUS_ON_CLIENT => true,
+        ]);
+
+        return $status_event->status;
+    }
+}