When using "Generate C# Class" on an .inputaction asset, giving an action a name that is also a C# keyword will lead to a compile error.

Repro:

1. Create .inputactions asset
2. Add an action map and an action called "return"
3. Save the asset
4. Enable "Generate C# Class" in the importer settings and hit Apply
5. Observe compile error after Unity has finished importing

The problem is that we properly escape uses of action and action map names on properties (e.g. "@return") but do not do so in some other pieces of the generated code.