minor update : README.md (#4)

almereyda · jieter · commit 750b1f0f9b37 · 2018-06-20T22:59:03.000+02:00
closes code block markdown markup
diff --git a/README.md b/README.md
@@ -21,7 +21,7 @@ L.marker([42, -71], {
 L.marker([42, -71.5], {
   icon: L.spriteIcon('red')
 });
-
+```
 
 to build your own:
 
@@ -30,4 +30,4 @@ npm install
 npm run build
 ```
 
-should work with browserify
+should work with browserify
