Restoring an older public API method.

- I changed what I thought was a private API, but it turns out that
  people used Hunk#unshift. Because the Hunk#merge functionality is
  safer and more correct, I have provided Hunk#unshift as an alias to
  Hunk#merge.
- Note that Hunk#unshift should be considered deprecated and the alias
  will be removed in a future major version of Diff::LCS.

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/diff/lcs/hunk.rb b/lib/diff/lcs/hunk.rb
index ed0d75d..13e3622 100644
--- a/lib/diff/lcs/hunk.rb
+++ b/lib/diff/lcs/hunk.rb
@@ -81,6 +81,7 @@ class Diff::LCS::Hunk
       nil
     end
   end
+  alias_method :unshift, :merge
 
   # Determines whether there is an overlap between this hunk and the
   # provided hunk. This will be true if the difference between the two hunks