Dear Maintainer,

When setting labels for xtics, it looks like gnuplot adds some extra
space on the right to accomodate for the text width... if it were left
aligned. Angles 0° and 90° seem to have special case calculation.

This is especially annoying for multiplot when only the rightmost plots
are smaller for no reason.

I attach two gifs and the script to generate them, testing all the xtics
angles. One with the labels left-aligned (the default) one with the
labels right-aligned. The issue should become obvious.

It happens for the three terminals I tested: pngcairo, gif and qt.

Best regards,
Celelibi