The following statusbar output is not considered by sway to be following
the swaybar-protocol:
{"version":1}[[{"full_text":"2.89","urgent":false}],
However this one is:
{"version":1}\n[[{"full_text":"2.89","urgent":false}],
Both outputs contain a header with the required values and an unfinished
array of objects with the required values, but the first one is showed
verbatim.
This corrects the description of border_{top,bottom,left,right} in the
block properties table in swaybar-protocol.7. The values should be an
integer denoting the width/height rather than a boolean denoting
whether to show them.