[Toybox] [PATCH] lib/args.c: add quotes.

[enh]

This failure was a little hard to parse:

  tar: Unknown option mode (see "tar --help")

This would have been clearer:

  tar: Unknown option 'mode' (see "tar --help")
---
 lib/args.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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