tests/svn-safe-append.py

test-revert: name files by state, not by state transition

This is the main patch in a series. See motivation in earlier patch.

In this patch, we actually change the names of the generated
files. For example, the file that is currently called missing_clean
becomes missing_missing_missing-tracked and it's clearer that it
should be tracked. It turns out that since the state was not
previously clear, it ended up testing an untracked state, which was
the same as for missing_clean. We'll fix this in a later patch.

Let's also change the content from (base,parent,wc) to
(content1,content2,content3) to make them all the same length so they
line up when displayed.

#!/usr/bin/env python

__doc__ = """Same as `echo a >> b`, but ensures a changed mtime of b.
Without this svn will not detect workspace changes."""

import sys, os

text = sys.argv[1]
fname = sys.argv[2]

f = open(fname, "ab")
try:
    before = os.fstat(f.fileno()).st_mtime
    f.write(text)
    f.write("\n")
finally:
    f.close()
inc = 1
now = os.stat(fname).st_mtime
while now == before:
    t = now + inc
    inc += 1
    os.utime(fname, (t, t))
    now = os.stat(fname).st_mtime