remove duplicated lines (note that you can have two different lines
with the same visible part if you use the -x option)
.IP "\fB-e\fP" 10
-start in the regexp mode
+start in regexp mode
.IP "\fB-a\fP" 10
-start in the case-sensitive mode
+start in case sensitive mode
.IP "\fB-q\fP" 10
make a flash instead of a beep when there is an edition error
.IP "\fB--\fP" 10