tests: simplify test-rebase-named-branches

We were cloning a repo to perform a smoke test that could
have been performed earlier.

tests/test-rebase-named-branches.t

@@ -1,157 +1,122
   $ cat >> $HGRCPATH <<EOF
   > [extensions]
   > graphlog=
   > rebase=
   > 
   > [alias]
   > tglog = log -G --template "{rev}: '{desc}' {branches}\n"
   > EOF
 
   $ hg init a
   $ cd a
   $ hg unbundle $TESTDIR/bundles/rebase.hg
   adding changesets
   adding manifests
   adding file changes
   added 8 changesets with 7 changes to 7 files (+2 heads)
   (run 'hg heads' to see heads, 'hg merge' to merge)
   $ hg up tip
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cd ..
 
 
 Rebasing descendant onto ancestor across different named branches
 
   $ hg clone -q -u . a a1
 
   $ cd a1
 
   $ hg branch dev
   marked working directory as branch dev
 
   $ echo x > x
 
   $ hg add x
 
   $ hg ci -m 'extra named branch'
 
   $ hg tglog
   @  8: 'extra named branch' dev
   |
   o  7: 'H'
   |
   | o  6: 'G'
   |/|
   o |  5: 'F'
   | |
   | o  4: 'E'
   |/
   | o  3: 'D'
   | |
   | o  2: 'C'
   | |
   | o  1: 'B'
   |/
   o  0: 'A'
   
+
+
+  $ hg rebase -s 7 -d 8
+  abort: source is ancestor of destination
+  [255]
+
   $ hg rebase -s 8 -d 7
   saved backup bundle to $TESTTMP/a1/.hg/strip-backup/*-backup.hg (glob)
 
   $ hg tglog
   @  8: 'extra named branch'
   |
   o  7: 'H'
   |
   | o  6: 'G'
   |/|
   o |  5: 'F'
   | |
   | o  4: 'E'
   |/
   | o  3: 'D'
   | |
   | o  2: 'C'
   | |
   | o  1: 'B'
   |/
   o  0: 'A'
   
   $ cd ..
  
 Rebasing descendant onto ancestor across the same named branches
 
   $ hg clone -q -u . a a2
 
   $ cd a2
 
   $ echo I > I
 
   $ hg ci -AmI
   adding I
 
   $ hg tglog
   @  8: 'I'
   |
   o  7: 'H'
   |
   | o  6: 'G'
   |/|
   o |  5: 'F'
   | |
   | o  4: 'E'
   |/
   | o  3: 'D'
   | |
   | o  2: 'C'
   | |
   | o  1: 'B'
   |/
   o  0: 'A'
   
   $ hg rebase -s 8 -d 7
   abort: source is descendant of destination
   [255]
 
   $ cd ..
  
-Rebasing ancestor onto descendant across different named branches
-
-  $ hg clone -q -u . a a3
-
-  $ cd a3
-
-  $ hg branch dev
-  marked working directory as branch dev
-
-  $ echo x > x
-
-  $ hg add x
-
-  $ hg ci -m 'extra named branch'
-
-  $ hg tglog
-  @  8: 'extra named branch' dev
-  |
-  o  7: 'H'
-  |
-  | o  6: 'G'
-  |/|
-  o |  5: 'F'
-  | |
-  | o  4: 'E'
-  |/
-  | o  3: 'D'
-  | |
-  | o  2: 'C'
-  | |
-  | o  1: 'B'
-  |/
-  o  0: 'A'
-  
-  $ hg rebase -s 7 -d 8
-  abort: source is ancestor of destination
-  [255]
-
-  $ cd ..
- 
-