Could you look at lines 677-689 and copy that format for the transition. This way we can use the same function and have consistency. If you feel that it needs to be extracted to a function we can do that as well.

:+1: to Sid's comment, although the line numbers look a little off to me. @biakymet, it's the last stanza of _update_transition.

Can you just re-factory and re-use the entire _update_transition function?

Can you just re-factory and re-use the entire _update_transition function?

The problem of refactoring _update_transition is that function is too specific, so it is better write own function for transition and than use it in _update_transition and in _create_jira_issue

You are using issue here. You will need to pass it in as a variable

Please add the appropriate docs, we use readthedocs so the format is very picky :(
Would look like:
"""
The reason for the function.

:param type_of_object name_of_object: what_the_object_does

Overall looks good:
1. Can you change default_status -> default_transition (we use transition for another parameter so it would make sense to keep the name transition) (change function name + param in the config file)
2. Update the README

1. Can you change default_status -> default_transition (we use transition for another parameter so it would make sense to keep the name transition) (change function name + param in the config file)

In that case meaning of default_transition is not very clear, because word transition can mean any transition, so I prefer leave it as it is.

LGTM, merging