docs: update manual page

Author: tshakalekholoane

bat.1

@@ -37,7 +37,7 @@ Undoes the persistence setting of the charging threshold between restarts.
 Print the charging status.
 .TP
 .B threshold \fInum\fP
-Print the current charging threshold limit. If num is specified--which should be a value between 1 and 100--this will set a new charging threshold limit.
+Print the current charging threshold limit. If num is specified (which should be a value between 1 and 100) this will set a new charging threshold limit.
 .SH EXAMPLES
 .PP
 Print the current battery charging threshold.