version/null: add inspect method.

This makes it easier to identify null versions when inspecting them.

1 files changed, 4 insertions, 0 deletions

diff --git a/Library/Homebrew/version/null.rb b/Library/Homebrew/version/null.rb
index 77106bcce..65e3d56c0 100644
--- a/Library/Homebrew/version/null.rb
+++ b/Library/Homebrew/version/null.rb
@@ -34,5 +34,9 @@ class Version
       ""
     end
     alias_method :to_str, :to_s
+
+    def inspect
+      "#<Version::NULL>".freeze
+    end
   end.new
 end