Fix spotify#5: Have file/s and branche/s with same name

This confuses git rev-list, so now we always use the -- separator.

git-test

@@ -430,7 +430,7 @@ if [ $action = clear ] ; then
 	rm -f "$cache"/*_fail "$cache"/*_pass
     else
 	refs="$(decide_refs "$@")"
-	commits="$(git rev-list --reverse $refs | tr "$NL" " ")"
+	commits="$(git rev-list --reverse $refs -- | tr "$NL" " ")"
 	count="$(echo "$commits" | wc -w)"
 
 	if test 1 -gt "$count" ; then
@@ -469,7 +469,7 @@ fi
 
 refs="$(decide_refs "$@")"
 refs="${refs% }"
-commits="$(git rev-list --reverse $refs | tr "$NL" " ")"
+commits="$(git rev-list --reverse $refs -- | tr "$NL" " ")"
 count="$(echo "$commits" | wc -w)"
 
 if test 1 -gt "$count" ; then

test.sh

@@ -381,6 +381,14 @@ info "Should just show version, even when not in a repo"
 GIT_DIR=.git/refs $PROJECT --version                 >out 2>err ; check
 grep "Not a git repo" out err                   >/dev/null 2>&1 ; check_fail
 
+info "Should not confuse files and branches"
+$PROJECT --clear                                >/dev/null 2>&1 ; check
+git checkout -b subject                         >/dev/null 2>&1 ; check
+add_commit "x" "differentiate branches"         >/dev/null 2>&1 ; check
+$PROJECT -v --verify=true subject ^master       >out 2>err ; check
+grep "^iter.*commit.*tree.*result$" out err     >/dev/null 2>&1 ; check
+
+
 info "TODO: check output report feature/s"
 
 if [ $verb -ge 1 ]; then