add __str__ to TaskRunnable in conds

[egisxxegis]

This pull request adds str method to TaskRunnable, found in rocketry.conditions.task.task.TaskRunnable.
By adding str method to TaskRunnable, we solve issue of AttributeError in issue (to be updated: I will create an issue) and let cast TaskRunnable to string.

[egisxxegis]

Link to issue: issue

[Miksus]

Thanks for the contribution, I think that looks good. Mind you creating a test case for this? I can also do it in case the test suites seem confusing, probably have time on Saturday for it.

Sorry for the delay in response.

[egisxxegis]

I have just added the test, and additionally added __str__ for TimeCondWrapper (because the test was failing). I am adding two screenshots of current pytest results (I suspect it has nothing to do with added __str__ methods).

...

[codecov-commenter]

Codecov Report

Base: 94.90% // Head: 95.05% // Increases project coverage by +0.14% 🎉

Coverage data is based on head (da8f881) compared to base (41b48bd).
Patch coverage: 84.61% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #149      +/-   ##
==========================================
+ Coverage   94.90%   95.05%   +0.14%     
==========================================
  Files          80       80              
  Lines        4454     4467      +13     
==========================================
+ Hits         4227     4246      +19     
+ Misses        227      221       -6     

Impacted Files	Coverage Δ
rocketry/conditions/api.py	97.34% <60.00%> (-1.03%)	⬇️
rocketry/conditions/task/task.py	98.03% <100.00%> (+4.16%)	⬆️

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[Miksus]

Yep, I think so too :)

The tests are a bit dependent on how fast your system is. It's pretty hard to do tests that test race conditions without relying on execution times. And that means the tests can depend on how fast your system is.

The most important thing is that the tests work well on the CI.

But I think it looks good. Thanks for the contribution and the effort you saw to fix this!