fix(formatter): JSX text wrapping incorrect

crates/oxc_formatter/src/formatter/format_element/mod.rs

@@ -393,7 +393,6 @@ pub trait FormatElements {
 
     /// Returns the end tag if:
     /// * the last element is an end tag of `kind`
-    #[expect(unused)]
     fn end_tag(&self, kind: TagKind) -> Option<&Tag>;
 }
 

crates/oxc_formatter/src/write/jsx/child_list.rs

@@ -122,7 +122,7 @@ impl FormatJsxChildList {
                     let is_trailing_or_only_whitespace = children_iter.peek().is_none();
 
                     if is_trailing_or_only_whitespace || is_after_line_break {
-                        multiline.write_separator(&JsxRawSpace, f);
+                        multiline.write_separator_in_last_entry(&JsxRawSpace, f);
                     }
                     // Leading whitespace. Only possible if used together with a expression child
                     //
@@ -599,6 +599,20 @@ impl<'a> MultilineBuilder<'a> {
         };
     }
 
+    /// Writes a separator into the last entry if it is an entry.
+    fn write_separator_in_last_entry(
+        &mut self,
+        separator: &dyn Format<'a>,
+        f: &mut Formatter<'_, 'a>,
+    ) {
+        if self.result.last().is_some_and(|element| element.end_tag(TagKind::Entry).is_some()) {
+            let last_index = self.result.len() - 1;
+            self.result.insert(last_index, f.intern(separator).unwrap());
+        } else {
+            self.write_content(separator, f);
+        }
+    }
+
     fn finish(self) -> FormatMultilineChildren<'a> {
         FormatMultilineChildren { layout: self.layout, elements: RefCell::new(self.result) }
     }

tasks/prettier_conformance/snapshots/prettier.js.snap.md

@@ -1,4 +1,4 @@
-js compatibility: 734/759 (96.71%)
+js compatibility: 735/759 (96.84%)
 
 # Failed
 
@@ -28,4 +28,3 @@ js compatibility: 734/759 (96.71%)
 | jsx/fbt/test.js | 💥 | 84.06% |
 | jsx/ignore/spread.js | 💥 | 83.33% |
 | jsx/jsx/quotes.js | 💥💥💥💥 | 79.41% |
-| jsx/text-wrap/test.js | 💥 | 99.56% |

tasks/prettier_conformance/snapshots/prettier.ts.snap.md

@@ -1,4 +1,4 @@
-ts compatibility: 573/604 (94.87%)
+ts compatibility: 574/604 (95.03%)
 
 # Failed
 
@@ -7,7 +7,6 @@ ts compatibility: 573/604 (94.87%)
 | jsx/fbt/test.js | 💥 | 84.06% |
 | jsx/ignore/spread.js | 💥 | 83.33% |
 | jsx/jsx/quotes.js | 💥💥💥💥 | 79.41% |
-| jsx/text-wrap/test.js | 💥 | 99.56% |
 | typescript/arrow/comments.ts | 💥✨ | 44.44% |
 | typescript/arrow/comments/issue-11100.ts | 💥 | 84.00% |
 | typescript/as/as-const/as-const.ts | 💥 | 90.91% |