[Bug other/69477] attribute aligned documentation misleading

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69477

--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Created attachment 37470
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37470&action=edit
Proposed patch.