Find all duplicates
^(.*)(\r?\n\1)+$
Remove all blank lines
^(?:[\t ]*(?:\r?\n|\r))+
Trim leading whitespace:
^\s+
Trim trailing whitespace:
\s+$
Search
Find all duplicates
^(.*)(\r?\n\1)+$
Remove all blank lines
^(?:[\t ]*(?:\r?\n|\r))+
Trim leading whitespace:
^\s+
Trim trailing whitespace:
\s+$