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Update file-system.md #253

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merged 2 commits into from Jun 25, 2014
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Update file-system.md #253

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Update file-system.md
alexanderwiebe Jun 25, 2014
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Update file-system.md
alexanderwiebe Jun 25, 2014
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Expand Up @@ -53,6 +53,6 @@ Our goal however is to eventually deprecate these legacy methods. If you find mi

## Writing existing files

Updating an existing file is not always a simple task. The most reliable way to do so is to parse the file AST (_asynchronous syntax tree_) and edit it. The issue here is that playing with AST is quite verbose and quite hard to grasp.
Updating an existing file is not always a simple task. The most reliable way to do so is to parse the file AST ( [abstract syntax tree](http://en.wikipedia.org/wiki/Abstract_syntax_tree) ) and edit it. The issue here is that playing with AST is quite verbose and quite hard to grasp.

To help simplify such case, Yeoman provide some common helper methods. Refer to the [API documentation](http://yeoman.github.io/generator/wiring.html) for the list of available methods.