Fix handling of HTML files without front matter

This means that any HTML file inside /content will be treated as a regular file.

If you want it processes with shortcodes and a layout, add front matter.

The defintion of an HTML file here is:

* File with extension .htm or .html
* With first non-whitespace character "<" that isn't a HTML comment.

This is in line with the documentation.

Fixes #7030
Fixes #7028
See #6789

deps/deps_test.go

@@ -15,14 +15,8 @@ package deps
 
 import (
 	"testing"
-
-	qt "github.com/frankban/quicktest"
 )
 
 func TestBuildFlags(t *testing.T) {
-	c := qt.New(t)
-	var bf BuildFlags
-	c.Assert(bf.HasLateTemplate.Load(), qt.Equals, false)
-	bf.HasLateTemplate.Store(true)
-	c.Assert(bf.HasLateTemplate.Load(), qt.Equals, true)
+
 }