#443 Support flag that triggers fparser to read code in OpenMP conditional sentinels

[hiker]

Fixed #443, and is important for FAB to detect dependencies in omp sentinels.

The implementation is (unfortunately) on two different levels:

1. Fixed format is handled on a line by line basis, since a continued conditional sentinel can be detected with an easy regexp.
2. Free format continued conditional sentinels can only be reliably detected if the previous line had a conditional sentinel, any simple reg.exp cannot distinguish this from e.g. !$omp (since a '&' and esp. spaces around that are all optional), so it's handled on higher up when combining multiple lines.

Moving the fixed format handling up (to the level where the free format is handled) seems to be more difficult, since free format is handled in many different ways when combining lines (strict format, fixed, f77) - so I opted for the two different levels.

I can confirm that this with changes fab now (when supplying the required optional flag) detects dependencies in conditional omp sentinels.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.07%. Comparing base (1259f8a) to head (338bd07).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #444      +/-   ##
==========================================
+ Coverage   91.99%   92.07%   +0.08%     
==========================================
  Files          85       85              
  Lines       13678    13825     +147     
==========================================
+ Hits        12583    12730     +147     
  Misses       1095     1095              

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[arporter]

Looks good Joerg, thanks for adding this.
Mostly small things/renaming/extending tests.
Please could you also update the documentation (I've indicated a suitable location somewhere in the review).

[hiker]

Ready for next review.

[arporter]

Hi @hiker, github isn't showing any commits since the last review?

[hiker]

Dang, yes, I missed that you updated this branch, so my push didn't go through, and I didn't notice. Now something should be there :)

[arporter]

Almost there now. Just a few minor things and some weird cases where black has changed a "..." + "..." into "..." "...".
Update doc builds fine.
I've checked on CodeCov and all is well, even if that's not being reported here.

[hiker]

Ready for next review.

[sergisiso]

@hiker @arporter and the Codecov status check is working again 🥳 (after we reinstalled the github app). I will close the codecov issue now.

[arporter]

All good now, thanks for those changes.
Will proceed to merge.