theme agnoster: remove trailing space

re-implemented expired pull request https://github.com/robbyrussell/oh-my-zsh/pull/1759

themes/agnoster.zsh-theme

@@ -88,9 +88,9 @@ prompt_git() {
     zstyle ':vcs_info:*' stagedstr '✚'
     zstyle ':vcs_info:git:*' unstagedstr '●'
     zstyle ':vcs_info:*' formats ' %u%c'
-    zstyle ':vcs_info:*' actionformats '%u%c'
+    zstyle ':vcs_info:*' actionformats ' %u%c'
     vcs_info
-    echo -n "${ref/refs\/heads\// }${vcs_info_msg_0_}"
+    echo -n "${ref/refs\/heads\// }${vcs_info_msg_0_%% }"
   fi
 }