fix: prevent jsx children wrapping in newlines when not necessary (#311)

Author: Declan Vong

src/parsing/parser.rs

@@ -7798,6 +7798,10 @@ fn parse_jsx_children<'a>(opts: ParseJsxChildrenOptions<'a>, context: &mut Conte
           return Some(true);
         }
 
+        // clear the end info when the start info changes
+        if condition_context.has_info_moved(&parent_start_info)? {
+          condition_context.clear_info(&parent_end_info);
+        }
         // use newlines if the entire jsx element is on multiple lines
         condition_resolvers::is_multiple_lines(condition_context, &parent_start_info, &parent_end_info)
       },

tests/specs/issues/issue0310.txt

@@ -0,0 +1,14 @@
+~~ lineWidth: 50 ~~
+== should not require double format ==
+const thisLengthMatters = () => (
+    <div prop={soDoesThisOneToo}>
+        <SomeComponent>{someVar}</SomeComponent>
+    </div>
+);
+
+[expect]
+const thisLengthMatters = () => (
+    <div prop={soDoesThisOneToo}>
+        <SomeComponent>{someVar}</SomeComponent>
+    </div>
+);