gen-changelog.py: Update the script for python3

	* gen-changelog.py (process_commit): Use the functional notation
	for the print function invocation required by python3.
	(output_commits, get_rel_tags, ): Specify that the output stream
	of the subprocess running the git command is in the text format.

Signed-off-by: Dodji Seketeli <dodji@redhat.com>
1 file changed