Call git-branch with --no-color

Having color.ui=always in ~/.gitconfig makes counsel-git-branch-list
show escape sequences in the branch list.

* counsel.el (counsel-git-branch-list): Call git-branch with
--no-color (abo-abo#2973).

Copyright-paperwork-exempt: yes

counsel.el

@@ -1793,7 +1793,8 @@ currently checked out."
                (and (string-match "\\`[[:blank:]]+" line)
                     (list (substring line (match-end 0)))))
              (let ((default-directory (counsel-locate-git-root)))
-               (split-string (shell-command-to-string "git branch -vv --all")
+               (split-string (shell-command-to-string
+                              "git branch -vv --all --no-color")
                              "\n" t))))
 
 ;;;###autoload