@code{nil}.
@vindex dabbrev-ignored-regexps
- A more fine control on which buffers are scanned is possible by
-customizing the variable @code{dabbrev-ignored-regexps}, whch should
+ A more fine control of the buffers that are scanned is possible by
+customizing the variable @code{dabbrev-ignored-regexps}, which should
contain a list of regular expressions. Buffers matching a regular
expression from that list are not searched.