HACKING: fix format-patch example dir mismatch
HACKING: fix format-patch example dir mismatch

Resolve disagreement over how to name an example directory.

Signed-off-by: Ben Wiederhake <b0fa5934dbca95d6bec7f0d68f2d402f6360b32d@gmail.com>
Reviewed-by: Gabriel Filion <143a18b53deb6612d517b2e11f8086b561f1df57@lelutin.ca>
[rlb@defaultvalue.org: adjust commit summary]

jbaber/bup,mhoeher/bup,gevaerts/bup,mhoeher/bup,pombredanne/bup,ToxicFrog/bup,jbaber/bup,tjanez/bup,mhoeher/bup,tjanez/bup,gevaerts/bup,jbaber/bup,ToxicFrog/bup,mhoeher/bup,pombredanne/bup,tjanez/bup,pombredanne/bup,jbaber/bup,tjanez/bup,mhoeher/bup,tjanez/bup,jbaber/bup,ToxicFrog/bup,jbaber/bup,ToxicFrog/bup,pombredanne/bup,ToxicFrog/bup,gevaerts/bup,pombredanne/bup,tjanez/bup,mhoeher/bup,gevaerts/bup,gevaerts/bup,pombredanne/bup