Fix: include comments at the end of blocks

[stsewd]

Dedenting was happening too early for inline comments that were after an expression.

The indentation level for these comments was the number of space between the expression and the # instead of indentation of the expression.

Fixes https://github.com/tree-sitter/tree-sitter-python/issues/113

[calixteman]

@maxbrunsfeld, ping ?

[amaanq]

Rebase please @stsewd :slightly_smiling_face:

[stsewd]

Since everything was migrated to C, I just opened a new PR instead of dealing with lots of merge conflicts, also I found a better solution https://github.com/tree-sitter/tree-sitter-python/pull/225.