[FIR generator] Don't print extra space in the where clause

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/printer/element.kt

@@ -75,7 +75,7 @@ fun SmartPrinter.printElement(element: Element) {
             )
         }
         print(multipleUpperBoundsList())
-        println("{")
+        println(" {")
         withIndent {
             allFields.forEach { field ->
                 if (field.isFinal && field.fromParent || field.isParameter) return@forEach

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/printer/transformer.kt

@@ -36,7 +36,7 @@ fun printTransformer(elements: List<Element>, generationPath: File): GeneratedFi
                 element.typeParameters.takeIf { it.isNotBlank() }?.let { print(it) }
                 println(
                     "transform${element.name}($varName: ${element.typeWithArguments}, data: D): ${element.transformerType
-                        .typeWithArguments}${element.multipleUpperBoundsList()}{",
+                        .typeWithArguments}${element.multipleUpperBoundsList()} {",
                 )
                 withIndent {
                     println("return transformElement($varName, data)")
@@ -52,7 +52,7 @@ fun printTransformer(elements: List<Element>, generationPath: File): GeneratedFi
 
                 println(
                     "visit${element.name}($varName: ${element.typeWithArguments}, data: D): ${element.transformerType
-                        .typeWithArguments}${element.multipleUpperBoundsList()}{",
+                        .typeWithArguments}${element.multipleUpperBoundsList()} {",
                 )
                 withIndent {
                     println("return transform${element.name}($varName, data)")

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/printer/utils.kt

@@ -153,11 +153,11 @@ fun Field.call(): String = if (nullable) "?." else "."
 
 fun Element.multipleUpperBoundsList(): String {
     return typeArguments.filterIsInstance<TypeArgumentWithMultipleUpperBounds>().takeIf { it.isNotEmpty() }?.let { arguments ->
-        val upperBoundsList = arguments.joinToString(", ", postfix = " ") { argument ->
+        val upperBoundsList = arguments.joinToString(", ") { argument ->
             argument.upperBounds.joinToString(", ") { upperBound -> "${argument.name} : ${upperBound.typeWithArguments}" }
         }
         " where $upperBoundsList"
-    } ?: " "
+    } ?: ""
 }
 
 fun ImplementationKind?.braces(): String = when (this) {

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/printer/visitor.kt

@@ -98,7 +98,7 @@ fun printVisitorVoid(elements: List<Element>, generationPath: File): GeneratedFi
                 if (element == AbstractFirTreeBuilder.baseFirElement) continue
                 with(element) {
                     val varName = safeDecapitalizedName
-                    println("open fun ${typeParameters}visit$name($varName: $typeWithArguments)${multipleUpperBoundsList()}{")
+                    println("open fun ${typeParameters}visit$name($varName: $typeWithArguments)${multipleUpperBoundsList()} {")
                     withIndent {
                         println("visitElement($varName)")
                     }
@@ -110,7 +110,7 @@ fun printVisitorVoid(elements: List<Element>, generationPath: File): GeneratedFi
             for (element in elements) {
                 with(element) {
                     val varName = safeDecapitalizedName
-                    println("final override fun ${typeParameters}visit$name($varName: $typeWithArguments, data: Nothing?)${multipleUpperBoundsList()}{")
+                    println("final override fun ${typeParameters}visit$name($varName: $typeWithArguments, data: Nothing?)${multipleUpperBoundsList()} {")
                     withIndent {
                         println("visit$name($varName)")
                     }