The sample code is needed. Because such picture can be produced by very old version (like 1.*) or by disabling rotated text and ticks tunning for x-axis.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
The sample code is needed. Because such picture can be produced by very old version (like 1.*) or by disabling rotated text and ticks tunning for x-axis.
It look as it was fixed.