completion: zsh: fix __gitcomp_direct()

Many callers append a space suffix, but zsh automatically appends a
space, making the completion add two spaces, for example:

  git log ma<tab>

Will complete 'master  '.

Let's remove that extra space.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/completion/git-completion.bash

@@ -3498,7 +3498,7 @@ if [[ -n ${ZSH_VERSION-} ]] &&
 
 		local IFS=$'\n'
 		compset -P '*[=:]'
-		compadd -Q -- ${=1} && _ret=0
+		compadd -Q -- ${${=1}% } && _ret=0
 	}
 
 	__gitcomp_nl ()

contrib/completion/git-completion.zsh

@@ -74,7 +74,7 @@ __gitcomp_direct ()
 
 	local IFS=$'\n'
 	compset -P '*[=:]'
-	compadd -Q -- ${=1} && _ret=0
+	compadd -Q -- ${${=1}% } && _ret=0
 }
 
 __gitcomp_nl ()