fix(ref): treat X#N as a reference only when X names a repository

Signed-off-by: bircni <bircni@icloud.com>

internal/app/ref_test.go

@@ -26,7 +26,6 @@ func TestParseRefAcceptsNumbersQualifiedNumbersAndURLs(t *testing.T) {
 		{raw: " 12 ", want: ref{Number: 12}},
 		{raw: "alice/project#12", want: ref{Number: 12, Repo: "alice/project"}},
 		{raw: "localhost:3001/alice/project#12", want: ref{Number: 12, Repo: "localhost:3001/alice/project"}},
-		{raw: "project#12", want: ref{Number: 12, Repo: "project"}},
 		{raw: "https://gitea.com/alice/project/issues/3", want: ref{Number: 3, Repo: "https://gitea.com/alice/project"}},
 		{raw: "https://gitea.com/alice/project/issues/3#issuecomment-79", want: ref{Number: 3, Repo: "https://gitea.com/alice/project"}},
 		{raw: "http://localhost:3001/base/alice/project/pulls/7/files?style=split", kind: pullRef, want: ref{Number: 7, Repo: "http://localhost:3001/base/alice/project"}},
@@ -52,7 +51,7 @@ func TestParseRefAcceptsNumbersQualifiedNumbersAndURLs(t *testing.T) {
 		require.NoError(t, err, tc.raw)
 		require.Equal(t, tc.want, got, tc.raw)
 	}
-	for _, branch := range []string{"feature/login", "bob:fix", "main"} {
+	for _, branch := range []string{"feature/login", "bob:fix", "main", "fix#12", "project#12", "bob:fix#3"} {
 		_, err := parseRef(branch, pullRef)
 		require.ErrorIs(t, err, errNotRef, branch)
 	}
@@ -164,6 +163,7 @@ func TestPullSelectorAcceptsNumbersURLsAndBranches(t *testing.T) {
 		{"bob:fix", 17, ""},
 		{"alice:fix", 0, `no open pull request for branch "alice:fix" in alice/project; pass a number, URL or branch`},
 		{"carol:dup", 21, ""},
+		{"fix#12", 0, `no open pull request for branch "fix#12" in alice/project`},
 		{"dup", 0, "several open pull requests"},
 		{serverURL + "/alice/project", 0, "is not a pull request URL"},
 	} {