Rewrite docstrings for skll/data/dict_vectorizer.py

[RobertImbrie]

• Add space between parameters.
• Delete two periods that conflict with the existing style.
• Remove 'optional' from parameters with default values.
• Move default values next to parameter names.

Notes: Still no array parameters!

[desilinguist]

@RobertImbrie one thing you should make sure to do is to always update the main branch in your working copy by running git pull after every PR merge. Otherwise, the branches you create will be out of date (as this one is).

[codecov[bot]]

Codecov Report

Merging #683 (abb3a84) into main (e9d28b4) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #683   +/-   ##
=======================================
  Coverage   96.85%   96.85%           
=======================================
  Files          63       63           
  Lines        9098     9098           
=======================================
  Hits         8812     8812           
  Misses        286      286           

Impacted Files	Coverage Δ
skll/data/dict_vectorizer.py	100.00% <ø> (ø)

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[RobertImbrie]

@desilinguist My mistake! I had been pulling to the feature branch, but not to main. I'll make sure to correct that in the future!