2e1585bda8
Previously the unchanged contents check tested both `key` and `value`
at the same time, so the following case was not accepted.
`ENV_VAR=ENV_VAR`
No matter how unlikely it is for the key to be equal to the value, there
is no reason to restrict it.
For the `key` ("0") column, protecting against existing keys also handles
this case. For the `value` ("1") column, a check has been added.
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| .. | ||
| dialogs | ||
| tabs | ||
| __init__.py | ||
| main_window.py | ||
| tray_icon.py | ||