tools: Skip decorating commits with references (branch name, remote)

I think we don't care about this in release notes.

bgpd,pimd,isisd,nhrpd: Convert to vty_json() (origin/fix/vty_json)
ospf6d: Fix memory leak for `show ipv6 ospf6 zebra json` (origin/fix/zebra_ospf6d_json_leak)

Signed-off-by: Donatas Abraitis <donatas.abraitis@gmail.com>

tools/release_notes.py

@@ -10,6 +10,7 @@
 import getopt
 import subprocess
 
+
 def run(cmd):
  proc = subprocess.Popen(cmd, stdout=subprocess.PIPE)
  rv = proc.communicate("")[0].decode("UTF-8")
@@ -45,7 +46,7 @@ def main(argv):
  tag = run(["git", "describe", "--abbrev=0"]).strip("\n")
 
  chnglog = run(
- ["git", "log", "--no-merges", "--pretty=format:'%s%d'", tag + ".." + branch]
+ ["git", "log", "--no-merges", "--pretty=format:'%s'", tag + ".." + branch]
  )
  chnglog = chnglog.split("\n")