Deprecated selector in `bas\styles\bas.less`

In `bas\styles\bas.less`:

Starting from Atom v1.13.0, the contents of `atom-text-editor` elements are no longer encapsulated within a shadow DOM boundary. This means you should stop using `:host` and `::shadow` pseudo-selectors, and prepend all your syntax selectors with `syntax--`. To prevent breakage with existing style sheets, Atom will automatically upgrade the following selectors:

* `atom-text-editor::shadow .highlight.find-result .region` => `atom-text-editor.editor .highlight.find-result .region`

* `atom-text-editor::shadow .highlight.current-result .region,
atom-text-editor::shadow .highlight.current-result ~ .highlight.selection .region` => `atom-text-editor.editor .highlight.current-result .region,
atom-text-editor.editor .highlight.current-result ~ .highlight.selection .region`

* `atom-text-editor::shadow .gutter div.line-number.git-line-added` => `atom-text-editor.editor .gutter div.line-number.git-line-added`

* `atom-text-editor::shadow .gutter div.line-number.git-line-modified` => `atom-text-editor.editor .gutter div.line-number.git-line-modified`

* `atom-text-editor::shadow .gutter div.line-number.git-line-removed:before` => `atom-text-editor.editor .gutter div.line-number.git-line-removed:before`

Automatic translation of selectors will be removed in a few release cycles to minimize startup time. Please, make sure to upgrade the above selectors as soon as possible.