@defopt history-length
The value of this variable specifies the maximum length for all
history lists that don't specify their own maximum lengths. If the
-value is @code{t}, that means there no maximum (don't delete old
+value is @code{t}, that means there is no maximum (don't delete old
elements). The value of @code{history-length} property of the history
list variable's symbol, if set, overrides this variable for that
particular history list.