Why are prompt expansions of %v sequences quoted in bindkey style?

[Marlon Richert <marlon.richert@gmail.com>]

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When I declare my prompt as:

PS1=$'%{\e[2m%}%#%{\e[0m%} '

this works as I expect it to: My prompt becomes a dim/faint % followed by a
space.

However, this does not work as I expect it to when I store the ANSI
sequences in $psvar.

The following code:

psvar=( $'%{\e[2m%}' $'%{\e[0m%}' )
PS1='%1v%#%2v '

results in the following prompt with terminal default color:

%{^[[2m%}%%{^[[0m%}

As you can see, the strings stored in $psvar are expanded in a quoted form,
à la bindkey.

Is this intentional? If so, why? Is there a way to circumvent this?

I would like strings in $psvar to be inserted literally when using %v
prompt sequences.

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