requirements/ruby_requirement: fix Rubocop warnings.

1 files changed, 1 insertions, 1 deletions

diff --git a/Library/Homebrew/requirements/ruby_requirement.rb b/Library/Homebrew/requirements/ruby_requirement.rb
index c445bd408..dd0039638 100644
--- a/Library/Homebrew/requirements/ruby_requirement.rb
+++ b/Library/Homebrew/requirements/ruby_requirement.rb
@@ -3,7 +3,7 @@ class RubyRequirement < Requirement
   default_formula "ruby"
 
   def initialize(tags)
-    @version = tags.shift if /(\d\.)+\d/ === tags.first
+    @version = tags.shift if /(\d\.)+\d/ =~ tags.first
     raise "RubyRequirement requires a version!" unless @version
     super
   end