Deprecated selector in `adventurous-syntax\index.less`

[Arihant25]

In adventurous-syntax\index.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, :host => atom-text-editor,atom-text-editor

• atom-text-editor .wrap-guide, :host .wrap-guide => atom-text-editor .wrap-guide,atom-text-editor .wrap-guide

• atom-text-editor .indent-guide, :host .indent-guide => atom-text-editor .indent-guide,atom-text-editor .indent-guide

• atom-text-editor .invisible-character, :host .invisible-character => atom-text-editor .invisible-character,atom-text-editor .invisible-character

• atom-text-editor .gutter, :host .gutter => atom-text-editor .gutter,atom-text-editor .gutter

• atom-text-editor .gutter .line-number, :host .gutter .line-number => atom-text-editor .gutter .line-number,atom-text-editor .gutter .line-number

• atom-text-editor .gutter .line-number.cursor-line, :host .gutter .line-number.cursor-line => atom-text-editor .gutter .line-number.cursor-line,atom-text-editor .gutter .line-number.cursor-line

• atom-text-editor .gutter .line-number.cursor-line-no-selection, :host .gutter .line-number.cursor-line-no-selection => atom-text-editor .gutter .line-number.cursor-line-no-selection,atom-text-editor .gutter .line-number.cursor-line-no-selection

• atom-text-editor .gutter .line-number.folded, :host .gutter .line-number.folded, atom-text-editor .gutter .line-number:after, :host .gutter .line-number:after, atom-text-editor .fold-marker:after, :host .fold-marker:after => atom-text-editor .gutter .line-number.folded,atom-text-editor .gutter .line-number.folded, atom-text-editor .gutter .line-number:after,atom-text-editor .gutter .line-number:after, atom-text-editor .fold-marker:after,atom-text-editor .fold-marker:after

• atom-text-editor .scroll-view, :host .scroll-view => atom-text-editor .scroll-view,atom-text-editor .scroll-view

• atom-text-editor .invisible, :host .invisible => atom-text-editor .invisible,atom-text-editor .invisible

• atom-text-editor .cursor, :host .cursor => atom-text-editor .cursor,atom-text-editor .cursor

• atom-text-editor .selection .region, :host .selection .region => atom-text-editor .selection .region,atom-text-editor .selection .region

• .comment => .syntax--comment

• .support.function => .syntax--support.syntax--function

• .support.gfm => .syntax--support.syntax--gfm

• .entity.name.function => .syntax--entity.syntax--name.syntax--function

• .entity.name.type => .syntax--entity.syntax--name.syntax--type

• .entity.other.attribute-name => .syntax--entity.syntax--other.syntax--attribute-name

• .keyword => .syntax--keyword

• .keyword.control => .syntax--keyword.syntax--control

• .keyword.control .definition => .syntax--keyword.syntax--control .syntax--definition

• .keyword.operator => .syntax--keyword.syntax--operator

• .keyword.other.unit => .syntax--keyword.syntax--other.syntax--unit

• .storage => .syntax--storage

• .storage.modifier => .syntax--storage.syntax--modifier

• `.storage.import