- newfunction(:is_integer, :type => :rvalue, :doc => <<-EOS
-Returns true if the variable passed to this function is an Integer or
-a decimal (base 10) integer in String form. The string may
-start with a '-' (minus). A value of '0' is allowed, but a leading '0' digit may not
-be followed by other digits as this indicates that the value is octal (base 8).
+ newfunction(:is_integer, :type => :rvalue, :doc => <<-DOC
+ @summary
+ **Deprecated:** Returns true if the variable passed to this function is an Integer or
+ a decimal (base 10) integer in String form.
+
+ The string may start with a '-' (minus). A value of '0' is allowed, but a leading '0'
+ digit may not be followed by other digits as this indicates that the value is octal (base 8).
+
+ If given any other argument `false` is returned.