knotserver: urldecode refs

knotserver/routes.go

···
 func (h *Handle) Blob(w http.ResponseWriter, r *http.Request) {
 	treePath := chi.URLParam(r, "*")
 	ref := chi.URLParam(r, "ref")
+	ref, _ = url.PathUnescape(ref)
 
 	l := h.l.With("handler", "FileContent", "ref", ref, "treePath", treePath)
 
···
 
 func (h *Handle) Diff(w http.ResponseWriter, r *http.Request) {
 	ref := chi.URLParam(r, "ref")
+	ref, _ = url.PathUnescape(ref)
 
 	l := h.l.With("handler", "Diff", "ref", ref)
 
···
 		return
 	}
 
-	log.Println("branch", data.DefaultBranch)
 	if data.DefaultBranch == "" {
 		data.DefaultBranch = h.c.Repo.MainBranch
 	}