Minor proposed docstring revisions

[ThomasA]

This pull request is part of the review in openjournals/joss-reviews#749

[coveralls]

Coverage remained the same at 100.0% when pulling 97cf0b4 on ThomasA:patch-1 into 19f6fdc on astorfi:master.

[codecov]

Codecov Report

Merging #21 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##           master    #21   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           1      1           
  Lines          25     25           
=====================================
  Hits           25     25

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[astorfi]

Thank you for suggestions.

I think the description of the feature module should be changed. It looks like there is an extra redundant line break.

[astorfi]

Please update your fork and pull request once again. As I made a lot of changes comparing the fork that you have.

[ThomasA]

OK, I rebased the commits and made a few more edits. How about now?

[astorfi]

This is much better. Thanks. However, it may violate the PEP8 for limiting the length of each line.

[astorfi]

You commit has conflict. Please remove this pull request, update your fork and commit again.

[ThomasA]

I rebased the feature branch - hope it is OK now?

[astorfi]

Thank you so much for your modifications.