Fix formatting of if-else in exceptions.c

Author: dr-carlos

Objects/exceptions.c

@@ -2914,7 +2914,8 @@ SyntaxError_str(PyObject *op)
         filename = my_basename(self->filename);
         if (filename == NULL)
             return NULL;
-    } else {
+    }
+    else {
         filename = NULL;
     }
     have_lineno = (self->lineno != NULL) && PyLong_CheckExact(self->lineno);