more expr parsing tests

[mr-c]

• Fix CLT input format field with expression generates spurius warning #1498

WARNING  salad:load_tool.py:381 URI prefix '${ return ["http' of '${ return ["http://edamontology.org/format_2330", 42];}
' not recognized, are you missing a $namespaces section?
WARNING  salad:load_tool.py:381 URI prefix '${ return ["http' of '${ return ["http://edamontology.org/format_2330", 42];}
' not recognized, are you missing a $namespaces section?
WARNING  salad:load_tool.py:381 URI prefix '${return "http' of '${return "http://edamontology.org/format_2330";}
' not recognized, are you missing a $namespaces section?
WARNING  salad:load_tool.py:381 URI prefix '${return "http' of '${return "http://edamontology.org/format_2330";}
' not recognized, are you missing a $namespaces section?

[codecov]

Codecov Report

Merging #1507 (982586c) into main (6af9932) will decrease coverage by 10.99%.
The diff coverage is n/a.

❗ Current head 982586c differs from pull request most recent head 6b0412f. Consider uploading reports for the commit 6b0412f to get more accurate results

@@             Coverage Diff             @@
##             main    #1507       +/-   ##
===========================================
- Coverage   66.45%   55.46%   -11.00%     
===========================================
  Files          93       47       -46     
  Lines       16541     8294     -8247     
  Branches     4390     2160     -2230     
===========================================
- Hits        10992     4600     -6392     
+ Misses       4401     3147     -1254     
+ Partials     1148      547      -601     

Impacted Files	Coverage Δ
cwltool/utils.py
cwltool/cuda.py
cwltool/builder.py
cwltool/pathmapper.py
cwltool/checker.py
cwltool/job.py
cwltool/cwlviewer.py
cwltool/context.py
cwltool/sandboxjs.py
cwltool/cwlrdf.py
... and 36 more

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