String stuff

[fabianegli]

This PR aims to harmonize the use of strings and fix a lot of minor issues related with strings and regexes.

NB: the regex fix change has been reverted to make this a PR purely focussing on string formatting.

I don't think a changelog is necessary for this PR because it does not affect the behaviour of the code.

PR checklist

• This comment contains a description of changes (with reason)
• CHANGELOG.md is updated
• If you've fixed a bug or added code that should be tested, add tests!
• Documentation in docs is updated

[codecov]

Codecov Report

Merging #1596 (200c20a) into dev (201b3e0) will increase coverage by 0.01%.
The diff coverage is 58.84%.

@@            Coverage Diff             @@
##              dev    #1596      +/-   ##
==========================================
+ Coverage   64.63%   64.65%   +0.01%     
==========================================
  Files          54       54              
  Lines        6249     6232      -17     
==========================================
- Hits         4039     4029      -10     
+ Misses       2210     2203       -7     

Impacted Files	Coverage Δ
nf_core/create.py	85.93% <0.00%> (ø)
nf_core/licences.py	25.00% <0.00%> (ø)
nf_core/lint/actions_awsfulltest.py	88.88% <0.00%> (ø)
nf_core/lint/actions_awstest.py	83.33% <0.00%> (ø)
nf_core/lint/multiqc_config.py	80.43% <0.00%> (ø)
nf_core/lint/readme.py	79.31% <ø> (ø)
nf_core/lint/schema_lint.py	81.81% <0.00%> (ø)
nf_core/lint/schema_params.py	76.00% <0.00%> (ø)
nf_core/modules/lint/module_changes.py	76.00% <ø> (ø)
nf_core/modules/lint/module_deprecations.py	85.71% <ø> (ø)
... and 33 more

---

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[mirpedrol]

Looks good to me :)
Added a couple of suggestions of strings that can also be formatted, I hope I didn't forget too many!

[mirpedrol]

LGTM :)

[fabianegli]

Thank you 😃