lines-crc32 now crcs a \n at the end of each line. it is still off by one \n if the last line doesn't have a newline, but it's good enough for the parser

core/io/crc32/crc32.factor

@@ -30,4 +30,6 @@ DEFER: crc32-table inline
 : file-crc32 ( path -- n ) file-contents crc32 ;
 
 : lines-crc32 ( seq -- n )
-    HEX: ffffffff tuck [ [ (crc32) ] each ] reduce bitxor ;
+    HEX: ffffffff tuck [
+        [ (crc32) ] each CHAR: \n (crc32)
+    ] reduce bitxor ;