bug fix: electric-indent-mode causes incorrent indentation when adding c...

...omma after if statement

 I'd like to keep `electric-indent-mode` off for editing python files so that I can control exact indentation without surprise.


example of this bug would be:
```
        while temp and temp.val != value:
            if temp.val > value:
                temp = temp.left
            else:
                temp = temp.right

        if not temp|
```
with `electric-indent-mode` on, typing `:` at cursor will cause last `if` statement indented to within `while` statement, which is not always desired.