Change backticks to parantheses

Author: amarz45

mpvcam

@@ -4,12 +4,12 @@ main () { parse_opts "$@"
     cmd="mpv --pause=no --profile=low-latency --demuxer-lavf-format=video4linux2 --demuxer-lavf-o-set=input_format=mjpeg av://v4l2:/dev/video$camera --untimed --cache=no --force-seekable=no --no-osc --script-opts-add=osc-visibility=never --really-quiet --title=Webcam"
 
     if [ -n "$toggle" ]; then
-	if [ `ps axh | grep "$cmd" | wc -l` -le 1 ]; then
+	if [ $(ps axh | grep "$cmd" | wc -l) -le 1 ]; then
 	    cmd
-	elif [ `xdotool search --onlyvisible --name Webcam | wc -l` -ge 1 ]; then
-	    xdotool windowunmap `xdotool search --name Webcam`
+	elif [ $(xdotool search --onlyvisible --name Webcam | wc -l) -ge 1 ]; then
+	    xdotool windowunmap $(xdotool search --name Webcam)
 	else
-	    xdotool windowmap `xdotool search --name Webcam`
+	    xdotool windowmap $(xdotool search --name Webcam)
 	fi
     else
 	cmd
@@ -18,16 +18,16 @@ main () { parse_opts "$@"
 
 cmd() { pkill -f /dev/video$camera || $cmd; }
 
-help() { echo -n "Usage: `basename $0` [options] [camera #]
+help() { echo -n "Usage: $(basename $0) [options] [camera #]
 
 Options:
--t|--toggle │ Hide/unhide `basename $0`
+-t|--toggle │ Hide/unhide $(basename $0)
 -h|--help   │ Print this help message and exit
 "; }
 
 parse_opts() {
-    : "${config_dir:=${XDG_CONFIG_HOME:-$HOME/.config}/`basename $0`}"
-    : "${config_file:=$config_dir/`basename $0`.conf}"
+    : "${config_dir:=${XDG_CONFIG_HOME:-$HOME/.config}/$(basename $0)}"
+    : "${config_file:=$config_dir/$(basename $0).conf}"
     [ -f "$config_file" ] && . "$config_file"
 
     die() { echo "$*" >&2; exit 2; }  # complain to STDERR and exit with error