Fix dump script log extract for debugging

[kay0u]

The problem

When a script fails, we get sometimes:

ERROR Could not upgrade gitlab: Something unexpected went wrong: 
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/yunohost/hook.py", line 538, in hook_exec_with_script_debug_if_failure
    operation_logger.dump_script_log_extract_for_debugging()
  File "/usr/lib/python3/dist-packages/yunohost/log.py", line 749, in dump_script_log_extract_for_debugging
    lines = [line.strip().split(": ", 1)[1] for line in lines]
  File "/usr/lib/python3/dist-packages/yunohost/log.py", line 749, in <listcomp>
    lines = [line.strip().split(": ", 1)[1] for line in lines]
IndexError: list index out of range

https://ci-apps-dev.yunohost.org/ci/job/10016

Solution

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PR Status

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How to test

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