@item ifdef @var{variable-name}
The @code{ifdef} form takes the @emph{name} of a variable as its
-argument, not a reference to a variable. The value of that variable
-has a non-empty value, the @var{text-if-true} is effective; otherwise,
-the @var{text-if-false}, if any, is effective. Variables that have
-never been defined have an empty value. The text @var{variable-name}
-is expanded, so it could be a variable or function that expands
-to the name of a variable. For example:
+argument, not a reference to a variable. If the value of that
+variable has a non-empty value, the @var{text-if-true} is effective;
+otherwise, the @var{text-if-false}, if any, is effective. Variables
+that have never been defined have an empty value. The text
+@var{variable-name} is expanded, so it could be a variable or function
+that expands to the name of a variable. For example:
@example
bar = true