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bug#12098: How to trap errors in man?

From: Juri Linkov
Subject: bug#12098: How to trap errors in man?
Date: Thu, 02 Aug 2012 02:10:54 +0300
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.1.50 (x86_64-pc-linux-gnu)

> things freezing for any reason should be something to be removed
> everywhere, not an excuse for allowing more badness.
> Async fetching and formatting of man pages is very useful if the man
> page is on a remote host running a different OS.

I guess the distinction is exactly like between sync and async
shell commands.  When you know that a command will finish quickly,
`shell-command' is more preferable, whereas `async-shell-command'
is better for a long-running process.

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