Add output filters for the 'compare' package

com.oracle.truffle.r.test.packages/test.output.filter

@@ -40,5 +40,20 @@
 # for all packages: delete line containing 'detaching ‘package:grid’'
 .* => D/detaching ‘package:grid’
 
-# for iterators:
-iterators => D/Warning: closing unused connection 3
\ No newline at end of file
+# for individual packages:
+
+# ------
+iterators => D/Warning: closing unused connection 3
+
+# ------
+# compare generates syntax error, GNUR unlike FastR provides some more details on the following 3 lines
+# FastR syntax error
+compare => D/Error in source(filename, local = TRUE) : parse error
+# GNUR syntax error does not have "parse error"
+compare => D+3/Error in source(filename, local = TRUE) :
+
+# different list elements order: list created from env with env2list(... sorted=F)
+# we remove the list item value and one line before, which will be the attribute name "$class"
+# plus we remove factor's "Levels" followed by the attribute value
+compare => D-1/[1] poor   poor   poor   middle middle middle
+compare => D/Levels: poor middle