Generating more simple construct instead of "let" in some cases

idea/testData/intentions/loopToCallChain/firstOrNull_let2.kt

@@ -0,0 +1,12 @@
+// WITH_RUNTIME
+fun foo(list: List<String>) {
+    var result: String? = null
+    <caret>for (s in list) {
+        if (s.length > 0) {
+            result = s.substring(0, s.length - 1)
+            break
+        }
+    }
+}
+
+fun bar(s: String): String = s

idea/testData/intentions/loopToCallChain/firstOrNull_let2.kt.after

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+fun foo(list: List<String>) {
+    <caret>val result: String? = list.firstOrNull { it.length > 0 }?.let { it.substring(0, it.length - 1) }
+}
+
+fun bar(s: String): String = s

idea/testData/intentions/loopToCallChain/firstOrNull_returnExpression.kt.after

@@ -1,4 +1,4 @@
 // WITH_RUNTIME
 fun foo(list: List<String>): Int? {
-    <caret>return list.firstOrNull { it.isNotEmpty() }?.let { it.length }
+    <caret>return list.firstOrNull { it.isNotEmpty() }?.length
 }

idea/testData/intentions/loopToCallChain/firstOrNull_safeDotExpression.kt

@@ -0,0 +1,10 @@
+// WITH_RUNTIME
+fun foo(list: List<String?>) {
+    var result: String? = null
+    <caret>for (s in list) {
+        if (s != "") {
+            result = s?.substring(1)
+            break
+        }
+    }
+}

idea/testData/intentions/loopToCallChain/firstOrNull_safeDotExpression.kt.after

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+fun foo(list: List<String?>) {
+    <caret>val result: String? = list.firstOrNull { it != "" }?.substring(1)
+}