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benefit of .struct

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section_1/structs/defining.md
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@ -115,7 +115,8 @@ Foo.c: // 23
fmt: .asciz "%p a: 0x%x b: 0x%x c: 0x%x\n" // 27
```
We aren't sure this method has anything to commend it over the previous
method other than it does emphasize that offsets are relative to the
data member that comes before it.
This method has a *substantial* benefit over the previous methods. Imagine
you need to insert a new field between `Foo.a` and `Foo.b`. Simply do so.
If you're using this third method, which is based on relative offsets, the
assembler will do the work of adjusting the following offsets for you.