fix(html/formatter): preserve closing > before self-closing elements

Exclude self-closing elements from the token borrowing pattern by only
setting next_is_adjacent_inline when the next element is an HtmlElement.

Author: terror

.changeset/sour-ducks-flash.md

@@ -0,0 +1,5 @@
+---
+"@biomejs/biome": patch
+---
+
+Fixed an issue where the HTML formatter mangled the closing `>` of inline elements when followed by self-closing elements like `<br>` or `<img>`.

crates/biome_html_formatter/src/html/lists/element_list.rs

@@ -763,11 +763,17 @@ impl FormatHtmlElementList {
                         // Take any borrowed `>` from the previous sibling element
                         let current_borrowed_r_angle = borrowed_sibling_r_angle.take();
 
+                        let next_can_borrow = next_is_adjacent_inline
+                            && matches!(
+                                children_iter.peek(),
+                                Some(HtmlChild::NonText(AnyHtmlElement::HtmlElement(_)))
+                            );
+
                         // Create the element formatter with borrowing options
                         let element_format = format_element_with_borrowing(
                             non_text,
                             current_borrowed_r_angle,
-                            next_is_adjacent_inline,
+                            next_can_borrow,
                         );
 
                         if needs_outer_group {
@@ -864,7 +870,9 @@ impl FormatHtmlElementList {
                         if next_is_adjacent_inline {
                             prev_inline_group_id = Some(non_text_group_id);
                             // Store the closing r_angle token from this element for the next sibling
-                            borrowed_sibling_r_angle = non_text.closing_r_angle_token();
+                            if next_can_borrow {
+                                borrowed_sibling_r_angle = non_text.closing_r_angle_token();
+                            }
                         } else {
                             prev_inline_group_id = None;
                         }

crates/biome_html_formatter/tests/specs/html/elements/inline/inline-before-self-closing.html

@@ -0,0 +1,4 @@
+<code>cubing.js</code><br>
+<span>foo</span><br>
+<b>bar</b><br>
+<a>link</a><img>

crates/biome_html_formatter/tests/specs/html/elements/inline/inline-before-self-closing.html.snap

@@ -0,0 +1,41 @@
+---
+source: crates/biome_formatter_test/src/snapshot_builder.rs
+info: elements/inline/inline-before-self-closing.html
+---
+# Input
+
+```html
+<code>cubing.js</code><br>
+<span>foo</span><br>
+<b>bar</b><br>
+<a>link</a><img>
+
+```
+
+
+=============================
+
+# Outputs
+
+## Output 1
+
+-----
+Indent style: Tab
+Indent width: 2
+Line ending: LF
+Line width: 80
+Attribute Position: Auto
+Bracket same line: false
+Whitespace sensitivity: css
+Indent script and style: false
+Self close void elements: never
+Trailing newline: true
+-----
+
+```html
+<code>cubing.js</code><br>
+<span>foo</span><br>
+<b>bar</b><br>
+<a>link</a><img>
+
+```