Add a regex filter

regex filter takes three arguments: <line_match> <insert_match> <replacement>
<line_match> is checked from begining of line to point of insertion
<insert_match> is checked on the inserted text (usually only one char)
<replacement> is used to replace the inserted text, it can use $1..9
for captures in line_match, and $c to specify the cursor position.

for example, ':addfilter regex .* \( ($c)' makes inserting an opening
parens insert the closing one as well, keeping the insertion cursor
in the right spot.

0 files changed, 0 insertions, 0 deletions