anchor.diff:  The bzr extractor is not very well tested as yet.
   
   When a git repo is actually a git-svn remote, this tool tries to do
  -the right thing and return a Subversion revision. The bug is that the
  +the right thing and return a Subversion revision.  The bug is that the
   detector code for this case is somewhat unreliable; you will get the
   hash instead if your configuration doesn't use svn-remote.svn.url.
   
  
positive.code: 
  *VCS_WC_MODIFIED*::
  Set to `1` if the current working directory has been modified and `0`
  if not. 'Untracked files are not ignored; see *`-U`* for details.'  If
  the output language is interpreted and has native Boolean literals,
  true will mean modified and false unmodified.  The C/C++ output is left as numeric so the preprocessor can test it.
  
  == OPTIONS ==
  
  *-t* '<output-type>'::
  Sets the output type. It is required unless *`-s`* is specified; both
  *`-t`* and *`-s`* cannot be used in the same invocation.
  
  *-s* '<symbol>'::
  Changes the reporting behavior; instead of emitting a symbol file to
  stdout, only the value of that individual symbol will be reported. It
  is required unless *`-t`* is specified; both *`-t`* and *`-s`* cannot
  be used in the same invocation.
  
  
negative.code: Java.
  
  *tex*::
  A TeX source file defining TeX macros.  Note that the symbols are
  given different names since the underscore has a special meaning in
  TeX. For example, VCS_SHORT_HASH is renamed to \vcsShortHash.
  
  *m4*::
  An m4 source file defining m4 macros.
  