Get rid of trailing spaces in text files

[DimitriPapadopoulos]

I have tried to leave out generated files.

[codecov]

Codecov Report

Merging #2894 (413814b) into master (9b689f7) will not change coverage.
The diff coverage is 100.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2894   +/-   ##
=======================================
  Coverage   81.41%   81.41%           
=======================================
  Files         145      145           
  Lines       20147    20147           
  Branches     3217     3217           
=======================================
  Hits        16402    16402           
  Misses       2929     2929           
  Partials      816      816           

Files Changed	Coverage Δ
dipy/nn/evac.py	81.50% <ø> (ø)
dipy/nn/synb0.py	53.73% <ø> (ø)
dipy/nn/utils.py	91.66% <ø> (ø)
dipy/reconst/mcsd.py	86.92% <ø> (ø)
dipy/viz/horizon/tab/base.py	89.28% <ø> (ø)
dipy/viz/horizon/tab/cluster.py	62.92% <ø> (ø)
dipy/viz/horizon/tab/peak.py	17.82% <ø> (ø)
dipy/viz/horizon/tab/roi.py	87.87% <ø> (ø)
dipy/viz/horizon/tab/slice.py	54.66% <ø> (ø)
dipy/viz/horizon/visualizer/cluster.py	74.31% <ø> (ø)
... and 3 more

[arokem]

LGTM.

A lot of this is in files that are probably not going to change in the future (e.g., release announcements, blog posts), so not crucial.

I guess we should also tell people somewhere in the dev documentation to set their text editors to take care of this, so it doesn't creep back into the codebase.

[skoudoro]

I might add pre-commit in this repo to take care of that in a close future @arokem. Same for the pep8 issues.

Thanks @DimitriPapadopoulos, merging

[DimitriPapadopoulos]

Indeed pre-commit + ruff would be a good addition for readability. I am cleaning up the code so that such additions become easier.