Replace appendln with appendLine in project

idea/performanceTests/test/org/jetbrains/kotlin/idea/perf/PerformanceNativeProjectsTest.kt

@@ -258,9 +258,9 @@ class PerformanceNativeProjectsTest : AbstractPerformanceProjectsTest() {
                         buildString {
                             originalKtFileContents.forEachIndexed { index, line ->
                                 if (index == packageLineIndex) {
-                                    appendln(line.replace("perfTestPackage1", "perfTestPackage$n"))
+                                    appendLine(line.replace("perfTestPackage1", "perfTestPackage$n"))
                                 } else {
-                                    appendln(line)
+                                    appendLine(line)
                                 }
                             }
                         }

idea/performanceTests/test/org/jetbrains/kotlin/idea/perf/Stats.kt

@@ -36,7 +36,7 @@ class Stats(
     init {
         statsOutput = statsFile.bufferedWriter()
 
-        statsOutput.appendln(header.joinToString())
+        statsOutput.appendLine(header.joinToString())
 
         PerformanceCounter.setTimeCounterEnabled(true)
     }
@@ -110,7 +110,7 @@ class Stats(
     private fun append(values: Array<Any>) {
         require(values.size == header.size) { "Expected ${header.size} values, actual ${values.size} values" }
         with(statsOutput) {
-            appendln(values.joinToString { it.toString() })
+            appendLine(values.joinToString { it.toString() })
             flush()
         }
     }

idea/performanceTests/test/org/jetbrains/kotlin/idea/testFramework/StatefulTestGradleProjectRefreshCallback.kt

@@ -52,20 +52,20 @@ class StatefulTestGradleProjectRefreshCallback(
         val error = error ?: return
 
         val failure = buildString {
-            appendln("Gradle import failed for ${project.name} at $projectPath")
+            appendLine("Gradle import failed for ${project.name} at $projectPath")
 
             project.guessProjectDir()
 
-            append("=".repeat(40)).appendln(" Error message:")
-            appendln(error.message.trimEnd())
+            append("=".repeat(40)).appendLine(" Error message:")
+            appendLine(error.message.trimEnd())
 
-            append("=".repeat(40)).appendln(" Error details:")
-            appendln(error.details?.trimEnd().orEmpty())
+            append("=".repeat(40)).appendLine(" Error details:")
+            appendLine(error.details?.trimEnd().orEmpty())
 
-            append("=".repeat(40)).appendln(" Gradle process output:")
-            appendln(GradleProcessOutputInterceptor.getInstance()?.getOutput()?.trimEnd() ?: "<interceptor not installed>")
+            append("=".repeat(40)).appendLine(" Gradle process output:")
+            appendLine(GradleProcessOutputInterceptor.getInstance()?.getOutput()?.trimEnd() ?: "<interceptor not installed>")
 
-            appendln("=".repeat(40))
+            appendLine("=".repeat(40))
         }
 
         fail(failure)