Quickfix for UNSAFE_INFIX_CALL

idea/testData/quickfix/nullables/unsafeInfixCall/afterUnsafeInfixCall.kt

@@ -0,0 +1,4 @@
+// "Replace with safe (?.) call" "true"
+fun test(a : Int?) : Int? {
+    return a?.compareTo(6);
+}

idea/testData/quickfix/nullables/unsafeInfixCall/beforeUnsafeInfixCall.kt

@@ -0,0 +1,4 @@
+// "Replace with safe (?.) call" "true"
+fun test(a : Int?) : Int? {
+    return a <caret>compareTo 6;
+}