Refactoring: change "// BUNCH: xxx" format

It wasn't obvious how to use this comment properly.
Now it should be clear

compiler/tests/org/jetbrains/kotlin/code/CodeConformanceTest.kt

@@ -138,7 +138,7 @@ class CodeConformanceTest : TestCase() {
         for (sourceFile in FileUtil.findFilesByMask(SOURCES_BUNCH_FILE_PATTERN, root)) {
             if (EXCLUDED_FILES_AND_DIRS.any { FileUtil.isAncestor(it, sourceFile, false) }) continue
 
-            val matches = Regex("BUNCH: (\\w+)").findAll(sourceFile.readText())
+            val matches = Regex("BUNCH (\\w+)").findAll(sourceFile.readText())
                 .map { it.groupValues[1] }.toSet().filterNot { it in extensions }
             for (bunch in matches) {
                 val filename = FileUtil.toSystemIndependentName(sourceFile.absoluteFile.toRelativeString(root))