doc: fix a typo in Chapter 5 (Standard Macros)

[jdeokkim]

• Note that the above lines are generate exactly the same code, (...)
  ➡️ Note that the above lines generate exactly the same code, (...)

[Yongjie2017]

Appreciate the capture of a typo.
Now the doc structure are changed significantly, could you re-base it and re-submit the patch?

[hpax]

I checked in a fix.