Add config option underscore_flagslbriais-feature/add_config_for_underscore_switch

The default behaviour of translation flags-with-dashes is to underscore
them so they're symbol friendly. This config option allows us to avoid
this translation and simply return the flags verbatim:

    opts = Slop.parse(underscore_flags: false) do |o|
      o.on "--foo-bar"
    end

    opts.to_hash #=> { :"foo-bar" => true }

closes #204

1 files changed, 4 insertions, 0 deletions

diff --git a/test/option_test.rb b/test/option_test.rb
index 78fd55e..a8db657 100644
--- a/test/option_test.rb
+++ b/test/option_test.rb
@@ -21,6 +21,10 @@ describe Slop::Option do
       assert_equal :foo_bar, option(%w(-f --foo-bar), nil).key
     end
 
+    it "when specified, it won't convert dashes to underscores to make multi-word options symbol-friendly" do
+      assert_equal :'foo-bar', option(%w(-f --foo-bar), nil, underscore_flags: false).key
+    end
+
     it "can be overridden" do
       assert_equal :bar, option(%w(-f --foo), nil, key: "bar").key
     end