Manual improvements

[tyhlee]

Mention independent/predictor variables and dependent/response variables at the same time at the top of the documentation.

Minor edits that do not change the context.

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: +0.57 :tada:

Comparison is base (b728917) 88.75% compared to head (0e77089) 89.32%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #520      +/-   ##
==========================================
+ Coverage   88.75%   89.32%   +0.57%     
==========================================
  Files           8        8              
  Lines        1040     1040              
==========================================
+ Hits          923      929       +6     
+ Misses        117      111       -6     

see 1 file with indirect coverage changes

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[bkamins]

Thank you. Let us wait for GLM.jl maintainers to comment.

[ayushpatnaikgit]

@mousum-github