PG warnings cleanup and minor contextFraction issue

lib/PGresource.pm

@@ -17,6 +17,7 @@
 package PGresource;
 use strict;
 use Exporter;
+use Scalar::Util;
 use UUID::Tiny  ':std';
 use PGcore;
 our @ISA= qw( PGcore ) ;
@@ -60,6 +61,7 @@ sub new {
 		%options,
 	};
 	bless $self, $class;
+	Scalar::Util::weaken($self->{parent_alias});
 	$self->warning_message( "PGresource must be called with an  alias object") unless ref($parent_alias) =~ /PGalias/;
 	$self->warning_message(  "PGresource must be called with a name" ) unless $id;
 	$self->warning_message(  "PGresource must be called with a type") unless $type;
@@ -114,4 +116,4 @@ sub fileName {
 	$self->{id} = $fileName if $fileName;
 	$self->{id};
 }
-1;
+1;

macros/PGML.pl

@@ -274,7 +274,7 @@ sub ForceBreak {
 
 sub Par {
   my $self = shift; my $token = shift;
-  $self->End(null, shift);
+  $self->End(undef, shift);
   $self->Item("par",$token,{noIndent => 1});
   $self->{atLineStart} = $self->{ignoreNL} = 1;
   $self->{indent} = $self->{actualIndent} = 0;
@@ -1092,7 +1092,7 @@ sub Align {
     "</div>\n";
 }
 
-my %bullet = (
+our %bullet = (
   bullet  => 'ul type="disc"',
   numeric => 'ol type="1"',
   alpha   => 'ol type="a"',
@@ -1366,7 +1366,7 @@ sub Align {
   return "<!-- PTX:WARNING: PGML wanted to " . $item->{align} . " align here. -->\n" . $self->string($item);
 }
 
-my %bullet = (
+our %bullet = (
   bullet  => 'ul',
   numeric => 'ol label="1."',
   alpha   => 'ol label="a."',

macros/PGbasicmacros.pl

@@ -1410,19 +1410,13 @@ =head2 Display Macros
               Latex2HTML => "output this in Latex2HTML mode",
              )
 
-    TEX     (tex_version, html_version) #obsolete
-
     M3      (tex_version, latex2html_version, html_version) #obsolete
 
 =cut
 
-sub TEX {
-	my ($tex, $html ) = @_;
-	MODES(TeX => $tex, HTML => $html, HTML_tth => $html, HTML_dpng => $html);
-}
 
 sub M3 {
-	my($tex, $l2h, $html) = @_;
+	my($tex,$l2h,$html) = @_;
 	MODES(TeX => $tex, Latex2HTML => $l2h, HTML => $html, HTML_tth => $html, HTML_dpng => $html);
 }
 

macros/contextFraction.pl

@@ -894,25 +894,25 @@ sub isReduced {
 sub string {
   my $self = shift; my $equation = shift; my $prec = shift;
   my ($a,$b) = @{$self->{data}}; my $n = "";
-  return $a if $b == 1;
+  return "$a" if $b == 1;
   if ($self->getFlagWithAlias("showMixedNumbers","showProperFractions") && CORE::abs($a) > $b)
     {$n = int($a/$b); $a = CORE::abs($a) % $b; $n .= " " unless $a == 0}
   $n .= "$a/$b" unless $a == 0 && $n ne '';
   $n = "($n)" if defined $prec && $prec >= 1;
-  return $n;
+  return "$n";
 }
 
 sub TeX {
   my $self = shift; my $equation = shift; my $prec = shift;
   my ($a,$b) = @{$self->{data}}; my $n = "";
-  return $a if $b == 1;
+  return "$a" if $b == 1;
   if ($self->getFlagWithAlias("showMixedNumbers","showProperFractions") && CORE::abs($a) > $b)
     {$n = int($a/$b); $a = CORE::abs($a) % $b; $n .= " " unless $a == 0}
   my $s = ""; ($a,$s) = (-$a,"-") if $a < 0;
   $n .= ($self->{isHorizontal} ? "$s$a/$b" : "${s}{\\textstyle\\frac{$a}{$b}}")
     unless $a == 0 && $n ne '';
   $n = "\\left($n\\right)" if defined $prec && $prec >= 1;
-  return $n;
+  return "$n";
 }
 
 sub pdot {