Standardize on --long-option instead of -long-option

[[forum/refresh_and_setup]] indicates some confusion between --setup
and -setup. Both work, but it's clearer if we stick to one in
documentation and code.

A 2012 commit to [[plugins/theme]] claims that "-setup" is required
and "--setup" won't work, but I cannot find any evidence in ikiwiki's
source code that this has ever been the case.

1 files changed, 1 insertions, 1 deletions

diff --git a/t/img.t b/t/img.t
index 2ea3abb24..6c295737e 100755
--- a/t/img.t
+++ b/t/img.t
@@ -50,7 +50,7 @@ EOF
 
 ok(! system("make -s ikiwiki.out"));
 
-my $command = "perl -I. ./ikiwiki.out -set usedirs=0 -templatedir=templates -plugin img t/tmp/in t/tmp/out -verbose";
+my $command = "perl -I. ./ikiwiki.out --set usedirs=0 --templatedir=templates --plugin img t/tmp/in t/tmp/out --verbose";
 
 ok(! system($command));