Simplify comparison fix introduced #KT-10509 Fixed

idea/testData/quickfix/simplifyComparison/doubleNull.kt

@@ -0,0 +1,11 @@
+// "Simplify comparison" "true"
+fun foo(x: String?) {
+    if (x == null) {
+
+    }
+    else {
+        if (<caret>x == null) {
+
+        }
+    }
+}

idea/testData/quickfix/simplifyComparison/doubleNull.kt.after

@@ -0,0 +1,11 @@
+// "Simplify comparison" "true"
+fun foo(x: String?) {
+    if (x == null) {
+
+    }
+    else {
+        if (false) {
+
+        }
+    }
+}

idea/testData/quickfix/simplifyComparison/notNull.kt

@@ -0,0 +1,6 @@
+// "Simplify comparison" "true"
+fun foo(x: Int) {
+    if (<caret>x != null) {
+
+    }
+}

idea/testData/quickfix/simplifyComparison/notNull.kt.after

@@ -0,0 +1,6 @@
+// "Simplify comparison" "true"
+fun foo(x: Int) {
+    if (true) {
+
+    }
+}

idea/testData/quickfix/simplifyComparison/nullOrNotNull.kt

@@ -0,0 +1,6 @@
+// "Simplify comparison" "true"
+fun foo(x: Int) {
+    if (<caret>x != null || x == null) {
+
+    }
+}

idea/testData/quickfix/simplifyComparison/nullOrNotNull.kt.after

@@ -0,0 +1,6 @@
+// "Simplify comparison" "true"
+fun foo(x: Int) {
+    if (true) {
+
+    }
+}

idea/testData/quickfix/simplifyComparison/somethingAndNotNull.kt

@@ -0,0 +1,6 @@
+// "Simplify comparison" "true"
+fun foo(x: Int, arg: Boolean) {
+    if (arg && <caret>x != null) {
+
+    }
+}

idea/testData/quickfix/simplifyComparison/somethingAndNotNull.kt.after

@@ -0,0 +1,6 @@
+// "Simplify comparison" "true"
+fun foo(x: Int, arg: Boolean) {
+    if (arg) {
+
+    }
+}