ElvisToIfThenIntention - smaller range + minor code improvements

idea/testData/intentions/branched/elvisToIfThen/callExpression.kt

@@ -6,5 +6,5 @@ fun bar() {
 }
 
 fun main(args: Array<String>) {
-    foo() ?: <caret>bar()
+    foo() ?:<caret> bar()
 }

idea/testData/intentions/branched/elvisToIfThen/callExpressionParens.kt

@@ -6,5 +6,5 @@ fun bar() {
 }
 
 fun main(args: Array<String>) {
-    (foo()) ?: <caret>bar()
+    (foo()) ?:<caret> bar()
 }

idea/testData/intentions/branched/elvisToIfThen/simpleNameExpression.kt

@@ -1,5 +1,5 @@
 fun main(args: Array<String>) {
     val foo: String? = "foo"
     var bar = "bar"
-    foo ?: <caret>bar
+    foo ?:<caret> bar
 }

idea/testData/intentions/branched/elvisToIfThen/simpleNameExpressionInParens.kt

@@ -2,5 +2,5 @@ fun bar(): String = "bar"
 
 fun main(args: Array<String>) {
     val foo: String? = "foo"
-    (foo) ?: <caret>bar()
+    (foo) ?:<caret> bar()
 }