respect indentation on version bump

[mashehu]

fixes #2206

[fabianegli]

This PR will prevent me form opening another duplicate of my own issue 🤣

I think it would be great to have a small specific test for that 😉

And I would have gone with capturing the spaces for preservation. Something like this:

                rf"version(\s*)=\s*[\'\"]?{re.escape(current_version)}[\'\"]?",
                rf"version\1= '{new_version}'",

[codecov]

Codecov Report

Merging #2514 (acf59c6) into dev (3fddb70) will decrease coverage by 0.04%.
Report is 41 commits behind head on dev.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              dev    #2514      +/-   ##
==========================================
- Coverage   70.53%   70.50%   -0.04%     
==========================================
  Files          87       88       +1     
  Lines        9456     9519      +63     
==========================================
+ Hits         6670     6711      +41     
- Misses       2786     2808      +22     

Files	Coverage Δ
nf_core/bump_version.py	90.76% <100.00%> (+0.29%)	⬆️

... and 13 files with indirect coverage changes

[mirpedrol]

Love it ❤️

[mashehu]

happy now with it, @fabianegli?

[fabianegli]

Very 😄