# shell variables must consist of alphanumeric characters and underscores,
# and begin with an alphabetic character or underscore.
-VARNAME='[A-Za-z_][A-zA-z0-9_]*'
+VARNAME='[A-Za-z_][A-Za-z0-9_]*'
# For the assigned value we only accept a limited number of characters - none
# of which are shell metachars