Combine adjacent strings into one string

[jdufresne]

Black has a bug such that strings that were previously multiple lines
sometimes end up as adjacent strings on one line. See:

psf/black#26

[codecov-io]

Codecov Report

Merging #999 into develop will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff            @@
##           develop     #999   +/-   ##
========================================
  Coverage    89.77%   89.77%           
========================================
  Files           12       12           
  Lines         2681     2681           
  Branches       457      457           
========================================
  Hits          2407     2407           
  Misses         186      186           
  Partials        88       88

[jdufresne]

Any idea why uploading to codecov is failing on Travis? The error is:

HTTP 400

Please upload with the Codecov repository upload token to resolve issue.

[jdufresne]

Looks like the error was only temporary

[timothycrosley]

Not sure what caused it, but glad it's working now!

Thanks for all this great work!