[rubygems/rubygems] Skip default gems executable example with Windows platform

ruby/rubygems@b4a8bda811

Author: hsbt

spec/bundler/commands/exec_spec.rb

@@ -197,6 +197,7 @@
 
     context "when not specified in Gemfile" do
       before do
+        skip "syntax_suggest executable is not provided on Windows" if Gem.win_platform?
         skip "syntax_suggest isn't a default gem" if default_ss_version.empty?
         skip "syntax_suggest executable is broken" if default_ss_version <= "2.0.1"