fix(formatter): BestFitting doesn't exactly matches the conditinalGroup behavior in Prettier

Author: Dunqing

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

@@ -378,9 +378,7 @@ impl<'a> Printer<'a> {
         } else {
             self.state.measured_group_fits = true;
 
-            let normal_variants = &best_fitting.variants()[..best_fitting.variants().len() - 1];
-
-            for variant in normal_variants {
+            for variant in best_fitting.variants() {
                 // Test if this variant fits and if so, use it. Otherwise try the next
                 // variant.
 

crates/oxc_formatter/src/utils/member_chain/mod.rs

@@ -231,8 +231,7 @@ impl<'a> Format<'a> for MemberChain<'a, '_> {
             }
             Ok(())
         });
-
-        let format_expanded = format_with(|f| write!(f, [self.head, indent(&group(&format_tail))]));
+        let format_expanded = format_with(|f| write!(f, [self.head, indent(&format_tail)]));
 
         let format_content = format_with(|f| {
             if has_comment || has_new_line_or_comment_between || self.groups_should_break(f) {

crates/oxc_formatter/tests/fixtures/ts/member-chains/expanded.ts

@@ -0,0 +1,3 @@
+const defaultColorDecoratorsEnablement = accessor
+  .get(IConfigurationService)
+  .getValue<'auto' | 'always' | 'never'>('longlonglonglonglonglonglonglonglong');

crates/oxc_formatter/tests/fixtures/ts/member-chains/expanded.ts.snap

@@ -0,0 +1,16 @@
+---
+source: crates/oxc_formatter/tests/fixtures/mod.rs
+---
+==================== Input ====================
+const defaultColorDecoratorsEnablement = accessor
+  .get(IConfigurationService)
+  .getValue<'auto' | 'always' | 'never'>('longlonglonglonglonglonglonglonglong');
+
+==================== Output ====================
+const defaultColorDecoratorsEnablement = accessor
+  .get(IConfigurationService)
+  .getValue<
+    "auto" | "always" | "never"
+  >("longlonglonglonglonglonglonglonglong");
+
+===================== End =====================