test-merge5: removed unnecessary parts of test

- no need to initialize a new directory
- no need to fix the commit time, already done by run-tests
- no need to exit 0, use exit code from hg instead
- better spacing around comments

tests/test-merge5.t

@@ -1,16 +1,14 b''
-  $ mkdir t
-  $ cd t
   $ hg init
   $ echo This is file a1 > a
   $ echo This is file b1 > b
   $ hg add a b
-  $ hg commit -m "commit #0" -d "1000000 0"
+  $ hg commit -m "commit #0"
   $ echo This is file b22 > b
-  $ hg commit -m"comment #1" -d "1000000 0"
+  $ hg commit -m "comment #1"
   $ hg update 0
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ rm b
-  $ hg commit -A -m"comment #2" -d "1000000 0"
+  $ hg commit -A -m "comment #2"
   removing b
   created new head
   $ hg update 1
@@ -20,16 +18,18 b''
   $ hg update -c
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ mv a c
-in theory, we shouldn't need the "-y" below, but it prevents
-this test from hanging when "hg update" erroneously prompts the
-user for "keep or delete"
 
-should abort
+In theory, we shouldn't need the "-y" below, but it prevents this test
+from hanging when "hg update" erroneously prompts the user for "keep
+or delete".
+
+Should abort:
+
   $ hg update -y 1
   abort: crosses branches (use 'hg merge' to merge or use 'hg update -C' to discard changes)
   $ mv c a
-should succeed
+
+Should succeed:
+
   $ hg update -y 1
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
-
-  $ exit 0