Omit implicit modifiers on FileSpec.scriptBuilder

kotlinpoet/src/commonMain/kotlin/com/squareup/kotlinpoet/CodeWriter.kt

@@ -238,13 +238,14 @@ internal class CodeWriter constructor(
     codeBlock: CodeBlock,
     isConstantContext: Boolean = false,
     ensureTrailingNewline: Boolean = false,
+    omitImplicitModifiers: Boolean = false,
   ) = apply {
     var a = 0
     var deferredTypeName: ClassName? = null // used by "import static" logic
     val partIterator = codeBlock.formatParts.listIterator()
     while (partIterator.hasNext()) {
       when (val part = partIterator.next()) {
-        "%L" -> emitLiteral(codeBlock.args[a++], isConstantContext)
+        "%L" -> emitLiteral(codeBlock.args[a++], isConstantContext, omitImplicitModifiers)
 
         "%N" -> emit(codeBlock.args[a++] as String)
 
@@ -393,15 +394,15 @@ internal class CodeWriter constructor(
     return false
   }
 
-  private fun emitLiteral(o: Any?, isConstantContext: Boolean) {
+  private fun emitLiteral(o: Any?, isConstantContext: Boolean, omitImplicitModifiers: Boolean) {
     when (o) {
       is TypeSpec -> o.emit(this, null)
       is AnnotationSpec -> o.emit(this, inline = true, asParameter = isConstantContext)
       is PropertySpec -> o.emit(this, emptySet())
       is FunSpec -> o.emit(
         codeWriter = this,
         enclosingName = null,
-        implicitModifiers = setOf(KModifier.PUBLIC),
+        implicitModifiers = if (omitImplicitModifiers) emptySet() else setOf(KModifier.PUBLIC),
         includeKdocTags = true,
       )
       is TypeAliasSpec -> o.emit(this)

kotlinpoet/src/commonMain/kotlin/com/squareup/kotlinpoet/FileSpec.kt

@@ -191,7 +191,7 @@ public class FileSpec private constructor(
     }
 
     if (isScript) {
-      codeWriter.emitCode(body)
+      codeWriter.emitCode(body, omitImplicitModifiers = true)
     } else {
       members.forEachIndexed { index, member ->
         if (index > 0) codeWriter.emit("\n")

kotlinpoet/src/commonTest/kotlin/com/squareup/kotlinpoet/FileSpecTest.kt

@@ -1187,7 +1187,7 @@ class FileSpecTest {
       |
       |println("hello!")
       |
-      |public fun localFun() {
+      |fun localFun() {
       |}
       |
       |public class Yay