Merge branch 'master' into 2.1ReleaseNotes

Author: DanielRosenwasser

pages/Interfaces.md

@@ -86,8 +86,8 @@ interface SquareConfig {
 function createSquare(config: SquareConfig): { color: string; area: number } {
     let newSquare = {color: "white", area: 100};
     if (config.color) {
-        // Error: Property 'collor' does not exist on type 'SquareConfig'
-        newSquare.color = config.collor;
+        // Error: Property 'color' does not exist on type 'SquareConfig'
+        newSquare.color = config.color;
     }
     if (config.width) {
         newSquare.area = config.width * config.width;