Format README

Author: jacoborus

README.md

@@ -65,8 +65,8 @@ Run:
 buckets <entry_path> [import_map_path] > out.js
 ```
 
-Buckets will look for `deno.json` or `deno.jsonc` in the current folder. To use a different
-imports map, pass it's path as the second argument
+Buckets will look for `deno.json` or `deno.jsonc` in the current folder. To use
+a different imports map, pass it's path as the second argument
 
 Alternatively, you can use it directly from the deno.land/x source: