Related to issue #598 - now compatible with OSX as well

[amjjbonvin]

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The last commit #599 broke the execution on OSX. This fix makes it work (tested both on OSX and Linux). The solution proposed by @mgiulini was to change os.ST_WRITE with stat.S_IWUSR in src/haddock/libs/libio.py

[codecov-commenter]

Codecov Report

Base: 73.63% // Head: 73.63% // No change to project coverage 👍

Coverage data is based on head (ce329a6) compared to base (ab15b98).
Patch coverage: 0.00% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #600   +/-   ##
=======================================
  Coverage   73.63%   73.63%           
=======================================
  Files         107      107           
  Lines        6942     6942           
=======================================
  Hits         5112     5112           
  Misses       1830     1830           

Impacted Files	Coverage Δ
src/haddock/libs/libio.py	77.07% <0.00%> (ø)

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[mgiulini]

I tested the solution on linux as well, it seems to be working fine!

[joaomcteixeira]

nice 1!