Make file selection more resistant to unexpected user input.

Rather than evaluating the expression

	case _f in
	$resp) ...
	esac

use the equivalent form

	case _f in
	@($resp)) ...
	esac

so that user input with multiple file names, user input with some
special characters like ';', etc. do not cause syntax errors and
premature ejection from the selection loop. A determined user can
still cause problems, e.g. by using quotes.

Clean up and simplify the code while in the area.

Problems noted by todd@.

0 files changed, 0 insertions, 0 deletions