Finish work started by commit a2f3db2 (although not documented
in commit message) of quoting using quotemeta the filename in
HTTP -content_disposition header.
Just in case filename contains end of line character.
Also use consistent coding style to compute -content_disposition
parameter.
Signed-off-by: Jakub Narebski <jnareb@gmail.com> Signed-off-by: Junio C Hamano <junkio@cox.net>