Addedn rangeContainsRange helper function

Author: Armando Aguirre

src/services/formatting/formatting.ts

@@ -665,7 +665,8 @@ namespace ts.formatting {
 
                 // if child is a list item - try to get its indentation, only if parent is within the original range.
                 let childIndentationAmount = Constants.Unknown;
-                if (isListItem && parent.pos >= originalRange.pos && parent.end <= originalRange.end) {
+
+                if (isListItem && rangeContainsRange(originalRange, parent)) {
                     childIndentationAmount = tryComputeIndentationForListItem(childStartPos, child.end, parentStartLine, originalRange, inheritedIndentation);
                     if (childIndentationAmount !== Constants.Unknown) {
                         inheritedIndentation = childIndentationAmount;