i3status: Try to make width more static

i3/i3status-rust/config.toml.j2

@@ -27,7 +27,7 @@ format = " $icon {$combo $prev $play $next|-} "
 block = "sound"
 driver = "pulseaudio"
 max_vol = 100
-format = " $icon{ $volume.eng(2)|} "
+format = " $icon{ $volume.eng(w:2)|} "
 
 [[block.click]]
 button = "left"
@@ -57,7 +57,7 @@ format = " $icon{ $signal_strength|}{ $ssid | }"
 
 [[block]]
 block = "load"
-format = " $icon $1m.eng(4) "
+format = " $icon $1m.eng(w:4) "
 warning = 4
 critical = 1000
 interval = 1