Make it possible to pass html options to submit_tag when using button_to
Merge pull request #1404 from graudeejs/impoved_button_to

Make it possible to pass options to submit_tag when using button_to
Fix incorrect params when path includes encoded slash, fixes #1391.

Add test case for incorrect params.
Merge pull request #1406 from namusyaka/fix-incorrect-params

Fix incorrect params when path includes encoded slash.