Move inline code to reusable script.
.SECONDEXPANSION:
-data/writing-latn.inc.pl: $$(@F)
- perl -MData::Dumper -wE 'my @t = do "$<" or die $$@; print Data::Dumper->new([\@t])->Terse(1)->Quotekeys(0)->Indent(1)->Dump' | sponge $@
+data/writing-latn.inc.pl: tools/perlinc-static $$(@F)
+ $< $(word 2,$^) | sponge $@
--- /dev/null
+#!/usr/bin/env perl
+use 5.014;
+use warnings;
+
+use Data::Dumper;
+
+my @data = do $ARGV[0] or die $@;
+print Data::Dumper->new([\@data])->Terse(1)->Quotekeys(0)->Indent(1)->Dump;