Don't include unindented comments preceding a function into its text range

#KT-10591 Fixed

idea/testData/indentationOnNewline/KT20783.after.kt

@@ -0,0 +1,6 @@
+object Test {
+//    some
+    fun test() {
+        <caret>
+    }
+}

idea/testData/indentationOnNewline/KT20783.kt

@@ -0,0 +1,5 @@
+object Test {
+//    some
+    fun test() {<caret>
+    }
+}