treewide: kill problematic "$h->{k} //= do {" assignments

As stated in the previous change, conditional hash assignments
which trigger other hash assignments seem problematic, at times.
So replace:

	$h->{k} //= do { $h->{x} = ...; $val };

	$h->{k} // do {
		$h->{x} = ...;
		$hk->{k} = $val
	};

"||=" is affected the same way, and some instances of "||=" are
replaced with "//=" or "// do {", now.

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/PublicInbox/WWW.pm b/lib/PublicInbox/WWW.pm
index b4db0582..a282784a 100644
--- a/lib/PublicInbox/WWW.pm
+++ b/lib/PublicInbox/WWW.pm
@@ -468,7 +468,7 @@ sub serve_mbox_range {
 
 sub news_www {
         my ($self) = @_;
-        $self->{news_www} ||= do {
+        $self->{news_www} //= do {
                 require PublicInbox::NewsWWW;
                 PublicInbox::NewsWWW->new($self->{pi_cfg});
         }
@@ -476,7 +476,7 @@ sub news_www {
 
 sub cgit {
         my ($self) = @_;
-        $self->{cgit} ||= do {
+        $self->{cgit} //= do {
                 my $pi_cfg = $self->{pi_cfg};
 
                 if (defined($pi_cfg->{'publicinbox.cgitrc'})) {