feat(formatter/html): add line break at the end of files (#4010)

crates/biome_html_formatter/src/html/auxiliary/root.rs

@@ -1,4 +1,5 @@
 use crate::prelude::*;
+use biome_formatter::write;
 use biome_html_syntax::HtmlRoot;
 #[derive(Debug, Clone, Default)]
 pub(crate) struct FormatHtmlRoot;
@@ -16,6 +17,7 @@ impl FormatNodeRule<HtmlRoot> for FormatHtmlRoot {
         if let Ok(eof) = node.eof_token() {
             eof.format().fmt(f)?;
         }
+        write!(f, [hard_line_break()])?;
 
         Ok(())
     }

crates/biome_html_formatter/tests/specs/html/attributes/break.html.snap

@@ -30,4 +30,5 @@ Attribute Position: Auto
 	disabled
 	class="w-full h-full bg-green text-white"
 	id="foo"
-></div>```
+></div>
+```

crates/biome_html_formatter/tests/specs/html/attributes/no-break.html.snap

@@ -25,4 +25,5 @@ Attribute Position: Auto
 -----
 
 ```html
-<div foo="bar" id="foo"></div>```
+<div foo="bar" id="foo"></div>
+```

crates/biome_html_formatter/tests/specs/html/attributes/self-closing.html.snap

@@ -25,4 +25,5 @@ Attribute Position: Auto
 -----
 
 ```html
-<meta charset="utf-8" />```
+<meta charset="utf-8" />
+```

crates/biome_html_formatter/tests/specs/html/attributes/single-quotes.html.snap

@@ -25,4 +25,5 @@ Attribute Position: Auto
 -----
 
 ```html
-<img src="foo.png'" alt='should keep "these" quotes' />```
+<img src="foo.png'" alt='should keep "these" quotes' />
+```

crates/biome_html_formatter/tests/specs/html/long-content.html.snap

@@ -36,4 +36,5 @@ Attribute Position: Auto
 	ornare ipsum. Class aptent taciti sociosqu ad litora torquent per conubia
 	nostra, per inceptos himenaeos. Ut nec dapibus est. Maecenas orci purus,
 	blandit eu faucibus eu, lacinia id turpis.
-</div>```
+</div>
+```

crates/biome_html_formatter/tests/specs/html/many-children.html.snap

@@ -37,4 +37,5 @@ Attribute Position: Auto
 	<div>Quuz</div>
 	<div>Corge</div>
 	<div>Grault</div>
-</div>```
+</div>
+```

crates/biome_html_formatter/tests/specs/html/self-closing.html.snap

@@ -30,4 +30,5 @@ Attribute Position: Auto
 <div>
 	<br />
 	<img />
-</div>```
+</div>
+```