Implement "Remove redundant '.let' call" binary operator support #KT-14396 Fixed

idea/testData/intentions/replaceSingleLineLetIntention/lambdaWithBinaryExpression.kt

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+// IS_APPLICABLE: false
+
+fun baz(foo: String) {
+    foo.let<caret> { it.indexOfLast { c -> c == it[0] } + 1 }
+}

idea/testData/intentions/replaceSingleLineLetIntention/lambdaWithBinaryExpression2.kt

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+// IS_APPLICABLE: false
+
+fun baz(foo: String) {
+    foo.let<caret> { it.length + "".indexOfLast { c -> c == it[0] } }
+}

idea/testData/intentions/replaceSingleLineLetIntention/letUseItAsParamWithBinaryExpression.kt

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+// IS_APPLICABLE: false
+
+fun foo() {
+    "".let<caret> { it.length + "".indexOf(it) }
+}

idea/testData/intentions/replaceSingleLineLetIntention/letUseItWithBinaryExpression.kt

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+// IS_APPLICABLE: false
+
+fun foo() {
+    "".let<caret> { it.length + it.length }
+}

idea/testData/intentions/replaceSingleLineLetIntention/letUseItWithBinaryExpression2.kt

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+// IS_APPLICABLE: false
+
+fun foo() {
+    "".let<caret> { it.substring(0, 1) + it }
+}

idea/testData/intentions/replaceSingleLineLetIntention/letWithBinaryExpression.kt

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+// IS_APPLICABLE: true
+
+fun foo() {
+    "".let<caret> { it.length + 1 }
+}

idea/testData/intentions/replaceSingleLineLetIntention/letWithBinaryExpression.kt.after

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+// IS_APPLICABLE: true
+
+fun foo() {
+    "".length + 1
+}

idea/testData/intentions/replaceSingleLineLetIntention/letWithSimpleBinaryExpression.kt

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+// IS_APPLICABLE: true
+
+fun foo() {
+    "".let<caret> { it + 1 }
+}

idea/testData/intentions/replaceSingleLineLetIntention/letWithSimpleBinaryExpression.kt.after

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+// IS_APPLICABLE: true
+
+fun foo() {
+    "" + 1
+}

idea/testData/intentions/replaceSingleLineLetIntention/letWithThisBinaryExpression.kt

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+// IS_APPLICABLE: true
+
+fun Int.foo() {
+    let<caret> { it.dec() + 1 }
+}

idea/testData/intentions/replaceSingleLineLetIntention/letWithThisBinaryExpression.kt.after

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+// IS_APPLICABLE: true
+
+fun Int.foo() {
+    dec() + 1
+}

idea/testData/intentions/replaceSingleLineLetIntention/letWithThisShortBinaryExpression.kt

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+// IS_APPLICABLE: true
+
+fun Int.foo() {
+    let<caret> { it + 1 }
+}

idea/testData/intentions/replaceSingleLineLetIntention/letWithThisShortBinaryExpression.kt.after

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+// IS_APPLICABLE: true
+
+fun Int.foo() {
+    this + 1
+}