ivy-completing-read chops off last character in PROMPT

[darkfeline]

Compare:

(ivy-completing-read "test" '("foo" "bar") nil nil nil nil '("spam" "eggs"))
(completing-read-default "test" '("foo" "bar") nil nil nil nil '("spam" "eggs"))

If ivy-completing-read really needs to remove the trailing space, it should make sure the last character is a space before unceremoniously decapitating PROMPT.

[abo-abo]

Thanks.