Simplify `branch_name` in bin/changelog

The `--short` option has existed since at least 1.8.1: https://git-scm.com/docs/git-symbolic-ref/1.8.1

Simplify `branch_name` in bin/changelog
614fcfc4 · Robert Speicher · 14046b9c · 614fcfc4
Commit 614fcfc4 authored 8 years ago by Robert Speicher
--- a/bin/changelog
+++ b/bin/changelog
@@ -158,7 +158,7 @@ class ChangelogEntry
  end
  
  def branch_name
-    @branch_name ||= %x{git symbolic-ref HEAD}.strip.sub(%r{\Arefs/heads/}, '')
+    @branch_name ||= %x{git symbolic-ref --short HEAD}.strip
  end
 end