Hi!
vi has perl regular expressions?
If you compile vim with perl support, you can directly execute perl commands inside vim

see also: http://vimdoc.sourceforge.net/htmldoc/if_perl.html

Have fun!

Update Your command would be: 

:perldo $_ =~ s/#1/# 1/g;

[download]
with :perldo executing the given command on each line of your file.

In reply to Re^2: (OT) Regular Expression by angiehope
in thread (OT) Regular Expression by Sun751

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