diff -r d8dbf91c149b -r 4edc1a308652 main_templates5/bfc.scala
--- a/main_templates5/bfc.scala	Mon Jan 03 00:59:32 2022 +0000
+++ b/main_templates5/bfc.scala	Sun Jan 09 01:06:30 2022 +0000
@@ -95,7 +95,7 @@
 // that is write(mem, mp, 0). 
 //
 // The easiest way to modify a string in this way is to use the regular
-// expression """[^<>+-,\[\]]""", which recognises everything that is 
+// expression """[^<>+\-.\[\]]""", which recognises everything that is 
 // not a bf-command and replace it by the empty string. Similarly the
 // regular expression """\[-\]""" finds all occurrences of [-] and 
 // by using the Scala method .replaceAll you can replace it with the