DOC: minor updates in comments and README

MMM-covid19.js

@@ -110,7 +110,7 @@ Module.register("MMM-covid19", {
 
 		// determine trend:
 		// calc this and last weeks cases and substract
-		// results the different of new cases between this and last week
+		// result is the difference of new cases between this and last week
 		// +10: red (arrow up)
 		//  +0: orange (arrow up)
 		//   0: normal (arrow right)

README.md

@@ -20,7 +20,6 @@ modules: [
                 position: "top_left",
                 config: {
                         // The config property is optional.
-                        // If no config is set, an example calendar is shown.
                         // See 'Configuration options' for more information.
                 }
         }