Updated README.md

README.md

@@ -3,6 +3,12 @@ This repository contains the CSL style file for Edition Open Access. It comes wi
 
 Testing can be done with the pandoc tool and its plugin pandoc-citeproc
 
-    pandoc --filter pandoc-citeproc  input.md -s -o output.html
+    pandoc --filter pandoc-citeproc input.md -s -o output.html
+
+in order to write to an HTML file, or simply
+
+    pandoc --filter pandoc-citeproc input.md
+
+to output HTML code to stdout (for quick checks or integration in other files).
 
 It also advisable to have the XML schema files for CSL handy. They can be cloned from https://github.com/citation-style-language/schema