/usr/share/gitolite3/syntactic-sugar/continuation-lines is in gitolite3 3.6.7-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36  | # vim: syn=perl:
# "sugar script" (syntactic sugar helper) for gitolite3
# Enabling this script in the rc file allows you to use back-slash escaped
# continuation lines, like in C or shell etc.
# This script also serves as an example "sugar script" if you want to write
# your own (and maybe send them to me).  A "sugar script" in gitolite will be
# executed via a perl 'do' and is expected to contain one function called
# 'sugar_script'.  This function should take a listref and return a listref.
# Each item in the list is one line.  There are NO newlines; g3 kills them off
# fairly early in the process.
# If you're not familiar with perl please do not try this.  Ask me to write
# you a sugar script instead.
sub sugar_script {
    my $lines = shift;
    my @out  = ();
    my $keep = '';
    for my $l (@$lines) {
        # skip RULE_INFO lines if in continuation mode
        next if $keep and $l =~ /^ *#/;
        if ( $l =~ s/\\$// ) {
            $keep .= $l;
        } else {
            $l = $keep . $l if $keep;
            $keep = '';
            push @out, $l;
        }
    }
    return \@out;
}
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