List of steps to reproduce (step by step, including full links if applicable):

• Create a template (any page) that ends with ~~<noinclude/>~~
• Substitute the template in a new DiscussionTools section, or in a DiscussionTools reply
• Submit

What happens?:

• The message ends with two identical signatures

What should have happened instead?:

• The message ends with one single signature that was provided by the template

Software version (if not a Wikimedia wiki), browser information, screenshots, other information, etc:

• current enwiki