ryan

python pwb.py replace.py -dir:/home/riley/ryanbot -summary:'[[User:RyanBot|Bot:]] Removing duplicate {{[[Template:Check categories|Check categories]]}} template) ([[User:RyanBot/1|Task 1]]' '{{[Cc]heck categories(.*)}}\n{{[Cc]heck categories(.*)}}' '{{Check categories\1}}' -regex -pt:0 -cat:'Media needing category review as of 8 April 2016'
regex..

tog
{{[Cc]heck categories(.*)}}\n{{[Cc]heck categories(.*)}}

{{Check categories$1}}

sep
{{[Cc]heck categories(.*)}}\n(.*)\n{{[Cc]heck categories(.*)}}
http://regexr.com/3d7f9
{{Check categories$1}}\n$2