Make sure files don't get overwritten if someone mixes generated and normal stdlib sources in one folder during build.

js/js.translator/src/org/jetbrains/k2js/config/Config.java

@@ -121,11 +121,11 @@ public abstract class Config {
             "/kotlin/Maps.kt",
             "/kotlin/Exceptions.kt",
             "/kotlin/IterablesSpecial.kt",
-            "/generated/Arrays.kt",
-            "/generated/Collections.kt",
-            "/generated/Iterables.kt",
-            "/generated/Iterators.kt",
-            "/generated/IteratorsCommon.kt",
+            "/generated/_Arrays.kt",
+            "/generated/_Collections.kt",
+            "/generated/_Iterables.kt",
+            "/generated/_Iterators.kt",
+            "/generated/_IteratorsCommon.kt",
             "/kotlin/support/AbstractIterator.kt",
             "/kotlin/Standard.kt",
             "/kotlin/Strings.kt",

libraries/tools/kotlin-stdlib-gen/src/generators/GenerateStandardLib.kt

@@ -84,29 +84,29 @@ fun main(args: Array<String>) {
     templates.clear()
 
     collections()
-    templates.writeTo(File(outDir, "Arrays.kt")) {
+    templates.writeTo(File(outDir, "_Arrays.kt")) {
         buildFor(Arrays, "")
     }
 
     for (a in otherArrayNames) {
-        templates.writeTo(File(outDir, "${a}Arrays.kt")) {
+        templates.writeTo(File(outDir, "_${a}Arrays.kt")) {
             buildFor(PrimitiveArrays, a)
         }
     }
 
-    templates.writeTo(File(outDir, "Iterables.kt")) {
+    templates.writeTo(File(outDir, "_Iterables.kt")) {
         if (iteratorSignatures contains signature.flat()) "" else buildFor(Iterables, "")
     }
 
-    templates.writeTo(File(outDir, "IteratorsCommon.kt")) {
+    templates.writeTo(File(outDir, "_IteratorsCommon.kt")) {
         if (iteratorSignatures contains signature.flat()) "" else buildFor(Iterators, "")
     }
 
-    templates.writeTo(File(outDir, "Collections.kt")) {
+    templates.writeTo(File(outDir, "_Collections.kt")) {
         if (iteratorSignatures contains signature.flat()) buildFor(Collections, "") else ""
     }
 
-    generateDownTos(File(outDir, "DownTo.kt"), "package kotlin")
+    generateDownTos(File(outDir, "_DownTo.kt"), "package kotlin")
 }
 
 fun String.flat() = this.replaceAll(" ", "")