Update to glmSLMADS.assign and tidyups

[StuartWheater]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 29.90%. Comparing base (05c8de2) to head (d79c7d2).

Files with missing lines	Patch %	Lines
R/glmSLMADS.assign.R	0.00%	9 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff               @@
##           v6.3.5-dev     #458      +/-   ##
==============================================
- Coverage       30.67%   29.90%   -0.77%     
==============================================
  Files             139      139              
  Lines            5320     5761     +441     
==============================================
+ Hits             1632     1723      +91     
- Misses           3688     4038     +350     

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