macros.md: Documentation does not match example
macros.md: Documentation does not match example

It looks like the documentation was reflowed at some point, references to `t` are not present in this block, only in subsequent ones. If this is incorrect or if this section should be reflowed, please let me know and I'd be happy to do it.

lampepfl/dotty,lampepfl/dotty,dotty-staging/dotty,dotty-staging/dotty,sjrd/dotty,lampepfl/dotty,sjrd/dotty,sjrd/dotty,lampepfl/dotty,sjrd/dotty,dotty-staging/dotty,dotty-staging/dotty,lampepfl/dotty,sjrd/dotty,dotty-staging/dotty