Reply to message «Backtick cannot be escaped in double-quoted string», 
sent 20:40:42 11 April 2011, Monday
by ZyX:

I found what is the cause: it is my experiments with histchars: I tried to use 
histchars[0]=$'`' because I really hate `!' expansion if it is mapped to `!'.

Original message:
> When I write echo "\`abc'" instead of getting «`abc'» echoed I get prompt
> «dquote bquote>». Some time ago this construction worked normally. What may
> be the cause of such weird behavior? Zsh version 4.3.11-r1 («-r1» means
> that ebuild maintainers did huge enough changes to the ebuild to repost
> it), Gentoo amd64.