D3702: mercurial: add .t files to .editorconfig

[av6 (Anton Shestakov)]

av6 added inline comments.

INLINE COMMENTS

> .editorconfig:17
> +indent_style = space
> +indent_size = 2
> +trim_trailing_whitespace = false

Nit: I'd sort these two lines for consistency with the two entries above, otherwise looks good.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D3702

To: indygreg, #hg-reviewers
Cc: av6, mercurial-devel