[WWcvs] pg: Fixed typos in comments

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

Log Message:
-----------
Fixed typos in comments

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

Revision Data
-------------
Index: contextInequalities.pl
===================================================================
RCS file: /webwork/cvs/system/pg/macros/contextInequalities.pl,v
retrieving revision 1.21
retrieving revision 1.22
diff -Lmacros/contextInequalities.pl -Lmacros/contextInequalities.pl -u -r1.21 -r1.22
--- macros/contextInequalities.pl
+++ macros/contextInequalities.pl
@@ -343,10 +343,10 @@
 
 ##################################################
 #
-#  A special class usd for the variables in
+#  A special class used for the variables in
 #  inequalities, since they are not really
 #  variables for the formula.  (They don't need
-#  to be subtituted or given values when the
+#  to be substituted or given values when the
 #  formula is evaluated, and so on.)  These are
 #  really just placeholders, here.
 #