Assorted doc fixes/tweaks
Update documentation
Merge branch 'anders/diameter/doc/OTP-11519' into maint

* anders/diameter/doc/OTP-11519:
  Assorted doc fixes/tweaks
Merge branch 'peppe/common_test/r16b03_docs' into maint

* peppe/common_test/r16b03_docs:
  Update documentation

OTP-10631
OTP-11305
OTP-11523
OTP-11524
Update event handling documentation
Merge branch 'peppe/common_test/r16b03_docs_updated' into maint

* peppe/common_test/r16b03_docs_updated:
  Update event handling documentation

OTP-11524