Fix Gem executable

fzf

@@ -845,5 +845,5 @@ class FZF
   end
 end#FZF
 
-FZF.new(ARGV, $stdin).start if $0 == __FILE__
+FZF.new(ARGV, $stdin).start if ENV.fetch('FZF_EXECUTABLE', '1') == '1'
 

test/test_fzf.rb

@@ -3,6 +3,7 @@
 
 require 'minitest/autorun'
 $LOAD_PATH.unshift File.expand_path('../..', __FILE__)
+ENV['FZF_EXECUTABLE'] = '0'
 load 'fzf'
 
 class TestFZF < MiniTest::Unit::TestCase