Ticket 151 - strip leading '-' for mailcap sanitize

[Kevin J. McCarthy]

<https://gitlab.com/muttmua/mutt/issues/151> noticed that a leading '-' is not stripped from filenames, which could lead to them being interpreted as command arguments.

Is this an oversight, or am I missing something?

Thanks,

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Kevin J. McCarthy
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This seems like a good idea, and I'm a bit surprised no one has noticed it before. Perhaps the "expected" behavior is putting '--' before the %s, but neither the sample mailcap or manual mention that. So I would think it's a good idea to add the protection to mutt instead.

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