Catch while node output

[liamhuber]

That is not actually looped as input, but is nonetheless updated at each cycle.

I.e.

def wf(x, bound, y):
    while my_condition(x, bound):
        x = my_add(x, x)
        y = identity(x)
    return y

Which is now in the test cases.

I caught this edge case going through what issues can be closed when #108 is merged and found the counter example in #91 🙏

[github-actions]

👈 Launch a binder notebook on branch pyiron/flowrep/catch-reassigned-symbols

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.93%. Comparing base (4cae32b) to head (55fa88f).
⚠️ Report is 2 commits behind head on parsing_recipes.

Additional details and impacted files

@@               Coverage Diff                @@
##           parsing_recipes     #151   +/-   ##
================================================
  Coverage            98.93%   98.93%           
================================================
  Files                   27       27           
  Lines                 1879     1882    +3     
================================================
+ Hits                  1859     1862    +3     
  Misses                  20       20           

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