regular expresions
in visual code
include lines
[from]
abc\n def\n ghi
[to]
abc\n xyz\n ghi
[example]
abc
def
ghi
--execute-->
abc
xyz
ghi
replace
[from]
abc_(.?)_(.?)
[to]
abc-$1-$2
[example]
abc_def_hi
--execute-->
abc-def-ghi