shellquote: bugfix: assignment-arguments like 'v=['
shellquote: bugfix: assignment-arguments like 'v=['

Well-known command characters like [, ], {, }, {} are shellsafe
when not part of larger strings, so they are not quoted then. But
they way shellquote() whitelisted them caused assignment-arguments
like 'shellquote v=[' to not do an assignment at all.
The fix is to remove a 'continue' so the assignment is always done.

modernish/modernish