Shift-Tab inside a code block: remove one indent level from every line the
selection touches. Lines with no leading whitespace are left alone rather
than eating into their text, and a selection with nothing to outdent
declines so the binding can fall through.
Shift-Tab inside a code block: remove one indent level from every line the selection touches. Lines with no leading whitespace are left alone rather than eating into their text, and a selection with nothing to outdent declines so the binding can fall through.