Incorrect alignment of text with negative right bearing when aligned to right

Change 5364fd96a72c89b281f0540da909fe64d0575ccf broke right alignment of text that has a negative right bearing.

This is visible in Qt Creator where a fixed pitch font is used to draw line numbers. On X11, you'll see that the left edge of all line numbers that end with 2 will be misaligned with the other line numbers.