Issue #284 fix and extend hover of parameters.

[folk85]

Modify regex of parameter's values. Add division sign, allow spaces in values of parameters. Extend unittests with parameters variables.

@gnikit

[gnikit]

Cheers for the PR @folk85, I approved the runs and will have a look at it today. But in general it looks good.

[codecov]

Codecov Report

Merging #288 (6debd0e) into master (b604730) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #288   +/-   ##
=======================================
  Coverage   86.95%   86.95%           
=======================================
  Files          12       12           
  Lines        4569     4569           
=======================================
  Hits         3973     3973           
  Misses        596      596           

Impacted Files	Coverage Δ
fortls/regex_patterns.py	100.00% <100.00%> (ø)

[gnikit]

ok @folk85 I had a chance to play around with your suggested changes and it looks good, however when the code is split amongst multiple lines the hover message looks quite strange.

The ideal resolution would be to trim the forward and trailing whitespaces for PARAMETER_VAL, but off the top of my head that might be a bit complicated for this PR.

Alternatively, I am thinking of approving and merging and addressing the problem in a later PR.

FYI certain compiler vendors tend to structure their source codes for certain modules like OpenMP with these kind of indentations

let me know what you think.

[folk85]

@gnikit , thanks for the fast response. I also thought about many whitespaces, but I think it should be in separate issue and I have idea how to solve it.