Fix map-branches issues and add coloring for 'branch-heads',

man/src/git-map-branches.txt

Index: man/src/git-map-branches.txt
diff --git a/man/src/git-map-branches.txt b/man/src/git-map-branches.txt
index a925e9c56ea2e0b7cbe51e4ffafcb4ae497287e4..1bae3fba1da596cec96ae22d936f88c9014c9bc0 100644
--- a/man/src/git-map-branches.txt
+++ b/man/src/git-map-branches.txt
@@ -21,6 +21,7 @@ Git map-branches displays all local branches such that:
    (`*`) after the name.
 * Local branches are [green]#green#.
 * Remote branches are [red]#red# (usually, the root of all other branches).
+* 'branch-heads' branches are [blue]#blue#.
 * `{NO UPSTREAM}` is a special placeholder in [fuchsia]#magenta#.
 ** Branches which have this as their parent are usually misconfigured, and
    should be assigned a parent by checking out the branch and running git branch