mpd: Format multiline patterns properly in docs

(cherry picked from commit e2b36cb0f0702f44a25fcec79cca8dd3b3bded43)
docs: Fix reference

(cherry picked from commit 13fb2bf6048b1045d18ce708b9463585daf536de)
mpd: Format multiline patterns properly, second try

(cherry picked from commit f383e9ad4825d9d38de92eb2ddf207d97af62c43)