Merge branch '1.6' into 1.7

doc/sphinx/book/connectors/__php.rst

@@ -38,7 +38,7 @@ well — print "Insert succeeded". If the tuple already exists, the program will
 
     <?php
     $tarantool = new Tarantool('localhost', 3301);
-    
+
     try {
         $tarantool->insert('examples', [99999, 'BB']);
         echo "Insert succeeded\n";