tests: unify test-empty-dir

tests/test-empty-dir.t

@@ -1,16 +1,25 b''
-#!/bin/sh
+  $ hg init
+
+  $ echo 123 > a
+  $ hg add a
+  $ hg commit -m "first" a
+
+  $ mkdir sub
+  $ echo 321 > sub/b
+  $ hg add sub/b
+  $ hg commit -m "second" sub/b
 
-hg init
-echo 123 > a
-hg add a
-hg commit -m "first" a
-mkdir sub
-echo 321 > sub/b
-hg add sub/b
-hg commit -m "second" sub/b
-cat sub/b
-hg co 0
-cat sub/b 2>/dev/null || echo "sub/b not present"
-test -d sub || echo "sub not present"
+  $ cat sub/b
+  321
+
+  $ hg co 0
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
-true
+  $ cat sub/b 2>/dev/null || echo "sub/b not present"
+  sub/b not present
+
+  $ test -d sub || echo "sub not present"
+  sub not present
+
+  $ true
+