Expands selections to the closest containing pairs of single or double quotes or backticks.
The default keybinding is Ctrl+'.
With cursor at X, the command should select the string: "Here is the X cursor"
With cursor at X, the command should select the single quoted string: "Here is 'the X cursor' now"
With cursor at X, the command should select the double quoted string: "Here the cursor is 'outside' the X selection"