tests/test-remotefilelog-blame.t

progress: split up _print() method in bar-updating and debug-printing

I just thought this was clearer, but it turned out to also simplify
the next patch.

This seems to have sped up `hg perfprogress` from 1.85 s to 1.78 s.

Differential Revision: https://phab.mercurial-scm.org/D5529

#require no-windows

  $ . "$TESTDIR/remotefilelog-library.sh"

  $ hg init master
  $ cd master
  $ cat >> .hg/hgrc <<EOF
  > [remotefilelog]
  > server=True
  > EOF
  $ echo x > x
  $ hg commit -qAm x
  $ echo y >> x
  $ hg commit -qAm y
  $ echo z >> x
  $ hg commit -qAm z
  $ echo a > a
  $ hg commit -qAm a

  $ cd ..

  $ hgcloneshallow ssh://user@dummy/master shallow -q
  2 files fetched over 1 fetches - (2 misses, 0.00% hit ratio) over *s (glob)
  $ cd shallow

Test blame

  $ hg blame x
  0: x
  1: y
  2: z
  2 files fetched over 1 fetches - (2 misses, 0.00% hit ratio) over *s (glob)