Changed workaround according to recommendation by Jetbrains.

README.md

@@ -834,7 +834,7 @@ Feel free to use the code (in package ```de.platon42.intellij.jupiter```) for yo
 
 ## Changelog
 
-### V1.13 (15-Aug-22)
+### V1.13 (17-Aug-22)
 
 - Maintenance. Updated various dependencies (Kotlin 1.7.10) and AssertJ 3.23.1 and AssertJ-Guava 3.5.0.
 - Tried to fix unreproducible issue #9.

build.gradle

@@ -54,7 +54,7 @@ runPluginVerifier {
 
 patchPluginXml {
     setChangeNotes("""
-  <h4>V1.13 (15-Aug-22)</h4>
+  <h4>V1.13 (17-Aug-22)</h4>
     <ul>
       <li>Maintenance. Updated various dependencies (Kotlin 1.7.10) and AssertJ 3.23.1 and AssertJ-Guava 3.5.0.
       <li>Tried to fix unreproducible issue #9.

src/main/java/de/platon42/intellij/plugins/cajon/quickfixes/JoinStatementsQuickFix.kt

@@ -56,14 +56,8 @@ class JoinStatementsQuickFix(private val separateLineLimit: Int) : AbstractCommo
     }
 
     private fun addLineBreak(project: Project, lastElementBeforeConcat: PsiElement) {
-        val newLineNode = try {
-            PsiParserFacade.getInstance(project).createWhiteSpaceFromText("\n\t")
-        } catch (ex: NoSuchMethodError) {
-            // scheduled for removal, but alternate version not even available in 2020.3.
-            // So keep it here until we run into a problem.
-            // Changing the min version from 2017.3 to 2021.x is a major thing.
-            PsiParserFacade.SERVICE.getInstance(project).createWhiteSpaceFromText("\n\t")
-        }
+        // was PsiParserFacade.getInstance(project).createWhiteSpaceFromText("\n\t"), changed due to breaking API changes
+        val newLineNode = project.getService(PsiParserFacade::class.java).createWhiteSpaceFromText("\n\t")
         lastElementBeforeConcat.addAfter(newLineNode, lastElementBeforeConcat.firstChild)
     }