tests: unify test-backwards-remove

tests/test-backwards-remove.t

@@ -1,12 +1,16 b''
-#!/bin/sh
-hg init
-echo This is file a1 > a
-hg add a
-hg commit -m "commit #0" -d "1000000 0"
-ls
-echo This is file b1 > b
-hg add b
-hg commit -m "commit #1" -d "1000000 0"
-hg co 0
-# B should disappear
-ls
+  $ hg init
+  $ echo This is file a1 > a
+  $ hg add a
+  $ hg commit -m "commit #0" -d "1000000 0"
+  $ ls
+  a
+  $ echo This is file b1 > b
+  $ hg add b
+  $ hg commit -m "commit #1" -d "1000000 0"
+  $ hg co 0
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+
+B should disappear
+
+  $ ls
+  a