Reported by Ronald Hoogenboom <RHoogenboom@irdeto.com>.
For the shell assignment operator @samp{!=}, the right-hand side is
evaluated immediately and handed to the shell. The result is stored
-in the variable named on the left, and that variable becomes a simple
-variable (and will thus be re-evaluated on each reference).
+in the variable named on the left, and that variable is considered a
+recursively expanded variable (and will thus be re-evaluated on each
+reference).
@subheading Conditional Directives
@cindex ifdef, expansion