Allow more than one parameter group on def

[johnynek]

No description provided.

[codecov-commenter]

Codecov Report

Patch coverage: 98.41% and project coverage change: -0.01% ⚠️

Comparison is base (1b3dcdf) 91.75% compared to head (fda3edd) 91.75%.
Report is 4 commits behind head on master.

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1037      +/-   ##
==========================================
- Coverage   91.75%   91.75%   -0.01%     
==========================================
  Files          91       91              
  Lines        9460     9479      +19     
  Branches     2208     2197      -11     
==========================================
+ Hits         8680     8697      +17     
- Misses        780      782       +2     

Files Changed	Coverage Δ
...ain/scala/org/bykn/bosatsu/DefRecursionCheck.scala	97.61% <97.50%> (+0.21%)	⬆️
.../src/main/scala/org/bykn/bosatsu/Declaration.scala	98.91% <100.00%> (ø)
...src/main/scala/org/bykn/bosatsu/DefStatement.scala	100.00% <100.00%> (ø)
.../main/scala/org/bykn/bosatsu/SourceConverter.scala	97.56% <100.00%> (+0.01%)	⬆️
...re/src/main/scala/org/bykn/bosatsu/Statement.scala	98.75% <100.00%> (ø)

... and 6 files with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[johnynek]

related to #1026 -- with automatic currying, this syntax is superfluous, but with explicit function sizes, then it is useful when you have cases that will almost always be curried (like building comparison or equality functions from other functions).