[WWcvs] pg: Make sure comma's are represented correctly in TeX mode.

[dpvc v. a. <we...@ma...>]

Log Message:
-----------
Make sure comma's are represented correctly in TeX mode.  (They need
to be enclosed in braces to get the spacing right.)

Modified Files:
--------------
    pg/macros:
        contextCurrency.pl

Revision Data
-------------
Index: contextCurrency.pl
===================================================================
RCS file: /webwork/cvs/system/pg/macros/contextCurrency.pl,v
retrieving revision 1.8
retrieving revision 1.9
diff -Lmacros/contextCurrency.pl -Lmacros/contextCurrency.pl -u -r1.8 -r1.9
--- macros/contextCurrency.pl
+++ macros/contextCurrency.pl
@@ -456,6 +456,7 @@
   my $currency = ($self->{currency} || $self->context->{currency});
   my ($symbol,$comma,$decimal) = ($currency->{symbol},$currency->{comma},$currency->{decimal});
   $symbol = $self->context->operators->get($symbol)->{$type} || $symbol;
+  $comma = "{$comma}" if $type eq 'TeX';
   my $s = main::prfmt($self->value,"%.2f");
   $s =~ s/\./$decimal/;
   while ($s =~ s/(\d)(\d\d\d\D)/$1$comma$2/) {}