Footnote reference call identifiers are trimmed, but definition identifiers aren’t

[wooorm]

Some calls.[^ A][^B ]

[^A]: whatevs

[^B]: whatevs

Some calls.^ A

---

But:

Some calls.[^C][^D]

[^ C]: whatevs

[^D ]: whatevs

Some calls.^C

---

Note that a and b match, but c and d don’t.