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Mention of YAML export.

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1 parent b172c2e commit 2126fb21448ac8eaf6627b30b160a5aa81bf4b66 @bfontaine committed Feb 13, 2013
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  1. +2 −1 README.md
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@@ -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'

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