Wrong indentation of else after comment

[jindraivanek]

if true then 1
else //comment
    if true then 2
    else 3

gets formatted to

if true then 1
else //comment
     if true then 2
else 3

which is compiler error.

Without comment it works:

if true then 1
else
    if true then 2
    else 3

->

if true then 1
else if true then 2
else 3

[jindraivanek]

There is test for this here: https://github.com/dungpa/fantomas/blob/a97e52164707b904906ffcec6e8c2fbf494c4954/src/Fantomas.Tests/CommentTests.fs#L300-L318

but it is ignored.

[nojaf]

It was unclear to us why two tests are ignored, we just kept them ignore during move to dotnet core.

[jindraivanek]

Initially I thought this will be hard to fix because of how comment integration works, but then I found out we have positions of comments in Context.Comments, so we can use it to change output in case of comment.

See #244 :)