fix SyntaxWarning: invalid escape sequence '\+' (issue #107)

[frederic-mahe]

• eliminates warnings,
• captured patterns should be the same (longest string without a space before the end of the line),
• effect on output files is UNTESTED!

[ImagoXV]

Thank you @frederic-mahe
It stopped triggering the warning. It does not seem to impact results as no error is triggered.
However, I feel like something is weird with correction.
Vscode does not properly recognize the syntax :

Any thoughts about this ?

[frederic-mahe]

I've seen similar issues when writing nextflow code. Including complex bash code in shell blocks, especially regular expressions, seems to create parsing issues. Maybe the best course of actions is to put complex bash code in bash scripts rather than in shell blocks?

[ImagoXV]

That could fix it