FIX: state_space_cython misc

[ajgpitch]

add missing colons and fix indentation

[ajgpitch]

This fixes #696

[zhenwendai]

I have fixed the failed test case regarding the new version of matplotlib. @ajgpitch Could you update the branch? It seems that your changes fail on Python 2.7. Could you have a look at it? Thanks.

[ajgpitch]

I have merged in the latest devel branch and fixed another typo.
Tests for this may not pass until #693 and #695 are merged.

[ajgpitch]

This error in py2 illustrates why #695 is needed and #720 is advisable. The fix was made in state_space_cython.pyx but this had to be manually cythonized. I have done this now and will try another push

[codecov-io]

Codecov Report

Merging #697 into devel will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##           devel    #697   +/-   ##
=====================================
  Coverage     54%     54%           
=====================================
  Files        207     207           
  Lines      20955   20955           
  Branches    2818    2818           
=====================================
  Hits       11316   11316           
  Misses      9123    9123           
  Partials     516     516

[ajgpitch]

I also notice that there are no Travis tests for Python 3.7

[jbect]

This PR should be closed, since it has been merged as part of PR #719.

[ekalosak]

Closing due to #697 (comment)
Thank you @jbect and @ajgpitch .