Inline render_html_page to change compilation error

[matthewmcgarvey]

Purpose

No connected issue

Description

Before

After

Notice in the "Before" that the first code reference was a macro and not the usage site that caused the error. By removing the render_html_page we actually see the usage site in the error which will help people track down issues.

That macro was extracted here but you'll notice that this PR achieves the same level of DRY-ness without the separate macro.

Checklist

• - An issue already exists detailing the issue/or feature request that this PR fixes
• - All specs are formatted with crystal tool format spec src
• - Inline documentation has been added and/or updated
• - Lucky builds on docker with ./script/setup
• - All builds and specs pass on docker with ./script/test

[jwoertink]

Ooo! I like this. I think this also might make it easier to pass down the status as well without having to change up the interface