[PATCH] Fix alignment of blame output containing revision numbers >= 1000000

Hi,

Please find in attachment my (very first) patch addressing the issue
discussed in [1] and [2].

Log message (maybe a bit too verbose ...):
[[[
Fix alignment of blame output containing revision numbers >= 1000000

* subversion/include/svn_client.h
  (svn_client_blame_receiver3_t): Add parameters start_revnum and end_revnum,
   useful to the blame receiver in formatting its output.
* subversion/libsvn_client/blame.c
  (svn_client_blame5): Pass start_revnum and end_revnum to the blame receiver.
* subversion/svn/blame-cmd.c
  (blame_receiver_xml): Implement the updated svn_client_blame_receiver3_t.
  (blame_receiver): Implement the updated svn_client_blame_receiver3_t, and
   pass end_revnum to print_line_info.
  (print_line_info): Add parameter end_revnum, use it to determine the column
   width for the revision number.
* subversion/libsvn_client/deprecated.c
  (blame_wrapper_receiver2): Implement the updated
   svn_client_blame_receiver3_t.
]]]

There are some caveats:
1) This patch changes the svn_client_blame_receiver3_t interface
(already new in 1.7). I think this breaks the bindings.

2) This patch causes the following test failures:
FAIL: basic_tests.py 42: basic relative url target using current dir
FAIL: basic_tests.py 43: basic relative url target using other targets
FAIL: blame_tests.py 6: blame targets with peg-revisions
FAIL: blame_tests.py 8: ignore whitespace when blaming
FAIL: blame_tests.py 9: ignore eol styles when blaming
FAIL: blame_tests.py 12: blame target not in HEAD with peg-revisions
FAIL: blame_tests.py 14: blame -g output with inserted lines

That's because the revision number column in the blame output now only
has the minimum width necessary (previously this was always fixed to a
width of 6). So for low revision numbers this now comes out as:

[[[
1 jrandom This is the file 'iota'.
]]]

instead of (previous behavior):

[[[
     1 jrandom This is the file 'iota'.
]]]

I see two ways to fix this:
- Change the tests
- Change the patch, so that it is backwards compatible with the old
blame output for revision numbers <1000000 (i.e. always use minimum
width of 6, and larger if needed).

Comments, review, ... shoot.

Cheers,

-- 
Johan
[1] http://svn.haxx.se/dev/archive-2010-06/0175.shtml
[2] http://svn.haxx.se/dev/archive-2010-04/0463.shtml