Mention of YAML export.

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bfontaine · Feb 13, 2013 · 2126fb2 · 2126fb2
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commit 2126fb2
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/README.md b/README.md
@@ -85,7 +85,8 @@ g2 = JSONGraph::load('myGraph.json')
 ```
 
 You can also export a graph using the `.write` method. It guesses the format
-using the file extension.
+using the file extension. If the file extension is unknown, it uses the YAML
+format.
 
 ```ruby
 require 'graph'