From 5ca7339356d608fd80b3d20236d435ccedd89a5f Mon Sep 17 00:00:00 2001
From: Bas Leijdekkers <basleijdekkers@gmail.com>
Date: Fri, 4 Aug 2023 17:36:57 +0200
Subject: [PATCH] Java: don't insert unnecessary space in string templates when
 formatting (IDEA-321466)

GitOrigin-RevId: 196fa8dfc94555bf9554fb830aad1aa1dd0dcbf3
---
 .../psi/formatter/java/JavaSpacePropertyProcessor.java         | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/java/java-impl/src/com/intellij/psi/formatter/java/JavaSpacePropertyProcessor.java b/java/java-impl/src/com/intellij/psi/formatter/java/JavaSpacePropertyProcessor.java
index 8054e7cbc957..89856c413f8d 100644
--- a/java/java-impl/src/com/intellij/psi/formatter/java/JavaSpacePropertyProcessor.java
+++ b/java/java-impl/src/com/intellij/psi/formatter/java/JavaSpacePropertyProcessor.java
@@ -1958,6 +1958,9 @@ public final class JavaSpacePropertyProcessor extends JavaElementVisitor {
     if (type1 == JavaTokenType.GTGT && type2 != JavaTokenType.GT && type2 != JavaTokenType.EQ) return true;
     if (type1 != JavaTokenType.GT && type2 == JavaTokenType.GTGT) return true;
 
+    // Because 21 Preview is not the highest language level.
+    if (ElementType.STRING_TEMPLATE_FRAGMENTS.contains(type1) || ElementType.STRING_TEMPLATE_FRAGMENTS.contains(type2)) return true;
+
     Pair<IElementType, IElementType> key = pair(type1, type2);
     Boolean result = ourTokenStickingMatrix.get(key);