git diff -B: splitting up complete renames

[Jakub Narebski <jnareb@gmail.com>]

First: in Documentation/diffcore.txt there is an example of broken pair

  diffcore-break: For Splitting Up "Complete Rewrites"
  ----------------------------------------------------

  The second transformation in the chain is diffcore-break, and is
  controlled by the -B option to the git-diff-* commands.  This is
  used to detect a filepair that represents "complete rewrite" and
  break such filepair into two filepairs that represent delete and
  create.  E.g.  If the input contained this filepair:

  ------------------------------------------------
  :100644 100644 bcd1234... 0123456... M file0
  ------------------------------------------------

  and if it detects that the file "file0" is completely rewritten,
  it changes it to:

  ------------------------------------------------
  :100644 000000 bcd1234... 0000000... D file0
  :000000 100644 0000000... 0123456... A file0
  ------------------------------------------------

Shouldn't the last block read for the modern git read:

  ------------------------------------------------
  :100644 000000 bcd1234... 0123456... M99 file0
  ------------------------------------------------

or is it only for '-B' togehter with '-M' or '-C'?


Second: do you have per chance good examples of broken (and perhaps 
merged together) pair, such that it is affected by --diff-filter=B;
with -B<num> or -B<num1>/<num2> parameters needed, if required. COPYING 
and Makefile are one good example, but do you have literal files with 
similar behavior? 

Third: Do "git diff --no-index" (filesystem diff) can show breaking / 
use dissimilarity? I couldn't make it work...

-- 
Jakub Narebski
Poland