fix: truncate long channel names on data_mc plots

[lorenzennio]

Hey,

I realized that figures become unusable for long channel names:

I implemented a small fix for this, which results in:

[codecov]

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[alexander-held]

Hi, that's a good idea, thanks for improving this! The new behavior is better than the old and anyone needing more control over the string can edit the figure externally with matplotlib of course.

One very picky comment, can we go with an f-string here to be consistent with the rest of the codebase?

f"{label[:30]}..."

[alexander-held]

There's an extra space before the "..." now which might be a bit confusing? I think it makes more sense without the space as in the original picture.

[lorenzennio]

There's an extra space before the "..." now which might be a bit confusing? I think it makes more sense without the space as in the original picture.

I left this intentionally, so that it is separated from the actual name. But I'll change it if you prefer.

[alexander-held]

I don't feel super strongly, just thought that depending on where the cutoff happens it might end up looking like the region name is done and some other information was cut out instead. The ... without space is less clear in that regard I believe.

Happy to merge this, thanks again!

* only show first 30 characters of channel names on data/MC plots