Remove newline from description field in setup.cfg

[petertdavies]

What was wrong?

There is a newline in the description field in setup.cfg. This is illegal, but was only caught by python buildtools in after a recent patch.

How was it fixed?

Removed the newline.

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[codecov-commenter]

Codecov Report

Merging #395 (8e0440e) into master (8e8379d) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #395   +/-   ##
=======================================
  Coverage   94.92%   94.92%           
=======================================
  Files          46       46           
  Lines        2522     2522           
=======================================
  Hits         2394     2394           
  Misses        128      128           

Flag	Coverage Δ
unittests	94.92% <ø> (ø)

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[lightclient]

@ultratwo this is also addressed in #394