Update README.md

Author: kokororin

README.md

@@ -6,7 +6,7 @@ The missing phpfmt plugin for Visual Studio Code.
 
 Open command palette <kbd>F1</kbd> and select `Extensions: Install Extension`, then search for phpfmt.
 
-**Note**: PHP > 7.0 is required.
+**Note**: PHP > 7.0 is required.  
 **Note**: Only test in Linux and Darwin.
 
 ## Usage