prettydiff fallback

[bollwyvl]

Congrats on inclusion in jupyter! 🍰

On a vanilla Windows install, diff is not available, so test_present_string_diff will always fail.

This adds a fallback based on stdlib difflib.unified_diff, and accepts either unified or diff-default.

Another approach would be to always use diff -u (and keep the fallback) but just always assume unified diff.

[codecov-io]

Current coverage is 77.49%

Merging #41 into master will decrease coverage by -0.04% as of 447e16f

@@            master     #41   diff @@
======================================
  Files           25      25       
  Stmts         1540    1546     +6
  Branches         0       0       
  Methods          0       0       
======================================
+ Hit           1194    1198     +4
  Partial          0       0       
- Missed         346     348     +2

Review entire Coverage Diff as of 447e16f

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[bollwyvl]

Huzzah!

On Thu, Apr 21, 2016 at 8:34 AM Min RK [email protected] wrote:

Merged #41 #41.

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