Again, a very very tiny bug, in wxDev-C++ 7.4.2's editor.
You know, when a file is saved, if the option “Ensure that file ends with new line” is enabled, a new line is added at the end of that file.
But when you use the undoing feature, it lets this new line at the end of your file. I suppose that this new line isn't added to the undoing stack.
It doesn't bother me a lot, but it's a bug, and I don't like bugs, especially of this kind.