Fixed undo of moving actions

reading_machine/src/Action.cpp

@@ -36,7 +36,7 @@ Action Action::moveWordIndex(int movement)
 
   auto undo = [movement](Config & config, Action &)
   {
-    config.moveWordIndex(movement);
+    config.moveWordIndex(-movement);
   };
 
   auto appliable = [movement](const Config & config, const Action &)
@@ -56,7 +56,7 @@ Action Action::moveCharacterIndex(int movement)
 
   auto undo = [movement](Config & config, Action &)
   {
-    config.moveCharacterIndex(movement);
+    config.moveCharacterIndex(-movement);
   };
 
   auto appliable = [movement](const Config & config, const Action &)