Generator of main closing tag is broken if yield has arguments

[martinadamek]

It happens for example in JumpstartRails templates, where one of yields uses is <%= yield :title %>.
Closing </main> tag is not inserted in application.html.erb and the file ends up broken after ./bin/rails tailwindcss:install is executed.

[dhh]

cc @dixpac

[dixpac]

Thanks @dhh, I'll take a look tomorrow.