docs/i3bar-protocol: add missing newline

diff --git a/docs/i3bar-protocol b/docs/i3bar-protocol
index bd8ea5365a4a8883d023f9e4c6e2b88d8251626c..927631549fe9969622824b53c4435e6af08b77c1 100644 (file)
--- a/docs/i3bar-protocol
+++ b/docs/i3bar-protocol
@@ -225,7 +225,7 @@ instance::
        Instance of the block, if set
 x, y::
        X11 root window coordinates where the click occured
-button:
+button::
        X11 button ID (for example 1 to 3 for left/middle/right mouse button)
 
 *Example*: