embedded try: except: moves indent one tab left

[syspect-tech]

Prerequisites

• [ X] Put an X between the brackets on this line if you have done all of the following:
  • Reproduced the problem in Safe Mode: http://flight-manual.atom.io/hacking-atom/sections/debugging/#using-safe-mode
  • Followed all applicable steps in the debugging guide: http://flight-manual.atom.io/hacking-atom/sections/debugging/
  • Checked the FAQs on the message board for common solutions: https://discuss.atom.io/c/faq
  • Checked that your issue isn't already filed: https://github.com/issues?utf8=✓&q=is%3Aissue+user%3Aatom
  • Checked that there is not already an Atom package that provides the described functionality: https://atom.io/packages

Description

When making an indented try: except: statement auto-indent moves the except line one tab left.

Steps to Reproduce

1. Create a loop.
2. create a try/except with one statement on the same line as the try like: try: foo=bar
3. Hit new line and create an except: when you press the : button, the line will move one tab to the left.

Expected behavior: line will not change tab indent

Actual behavior: line moves one tab indent to the left

Reproduces how often: always

Versions

mac and ubuntu 1.21 and 1.24

You can get this information from copy and pasting the output of atom --version and apm --version from the command line. Also, please include the OS and what version of the OS you're running.

Additional Information

Any additional information, configuration or data that might be necessary to reproduce the issue.

[syspect-tech]

This has been discussed on the atom website discussion thread and confirmed reproduced by more than one person. https://discuss.atom.io/t/atom-1-20-1-line-tab-moving-when-editing-line-in-python-mac-os-high-sierra/52714/10. There is also video of another tab-indent problem which comes from if/elif lines on youtube here: https://www.youtube.com/watch?v=9LklzQ8n0hM. The problem was isolated to MagicPython package.