Fix bug regarding --foo=bar style options

This fixes the bug introduced in ebe678b1639654604b3e54b08ca710c38682b83e
where the argument after a flag is naively deleted. For example, with

    --foo=bar baz

, both `--foo=bar' and `baz' are deleted when only `--foo=bar' should be
deleted.

1 files changed, 5 insertions, 0 deletions

diff --git a/test/parser_test.rb b/test/parser_test.rb
index bfc4f7e..1099871 100644
--- a/test/parser_test.rb
+++ b/test/parser_test.rb
@@ -71,5 +71,10 @@ describe Slop::Parser do
       @parser.parse %w(lee --name lee lee)
       assert_equal %w(lee lee), @parser.arguments
     end
+
+    it "correctly removes options that use =" do
+      @parser.parse %w(lee --name=lee lee)
+      assert_equal %w(lee lee), @parser.arguments
+    end
   end
 end