Fix copy formatting and document options.filter

README.md

@@ -99,8 +99,9 @@ Methods
 Copy a file or directory. The directory can have contents. Like `cp -r`.
 
 Options:
-clobber (boolean): overwrite existing file or directory
-preserveTimestamps (boolean): will set last modification and access times to the ones of the original source files, default is `false`.
+clobber (boolean): overwrite existing file or directory  
+preserveTimestamps (boolean): will set last modification and access times to the ones of the original source files, default is `false`.  
+filter: Function or RegExp to filter copied files. If function, return true to include, false to exclude. If RegExp, same as function, where `filter` is `filter.test`.
 
 Sync: `copySync()`