[O] "git describe" in version of info file with "make info_git_describe"

[Michael Brand]

Hi Bernt, hi all

I appreciate that org-version adds the output of "git describe" to the
org-version string if we are running
from a git repository. Thanks to Bernt et al:
http://thread.gmane.org/gmane.emacs.orgmode/16620

Now I suggest the same for the info file by using the new target "make
info_git_describe" instead of "make info" for all who are running from
a git repository and are not building a release. I am about to finish
a patch for this but before posting it would like to know the reason
for "(subst-char-in-string ?- ?. git-version t)" in org-version here:
http://orgmode.org/w/?p=org-mode.git;a=blob;f=lisp/org.el;h=1ca03f48d86fac71837079f7c3219cb295a9c795;hb=HEAD#l217

Can I remove this substitution of "release_7.5-350-g3433" ->
"release_7.5.350.g3433" from org-version in my patch or should "make
info_git_describe" do the same and why?

Michael