Clarify list format for PRETTY_DEBUG_EXCLUDE

src/include-bash/pretty.sh

@@ -8,7 +8,7 @@ shellfu import exit
 PRETTY_DEBUG=${PRETTY_DEBUG:-}
 
 #
-# List of module/function names to exclude from debuging
+# Comma-separated list of module/function names to exclude from debuging
 #
 # For the sake of readability of your debug dumps, you can set this
 # variable to comma-separated list of module or function names that