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Here is the [complete language grammar](docs/04-grammar.md) for this chapter.
+You can also read [this chapter](https://github.com/SeaOfNodes/Simple/tree/linear-chapter04) in a linear Git revision history on the [linear](https://github.com/SeaOfNodes/Simple/tree/linear) branch and [compare](https://github.com/SeaOfNodes/Simple/compare/linear-chapter03...linear-chapter04) it to the previous chapter.
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## Extensions to Intermediate Representation
In this chapter we add some new nodes and revise some existing nodes.