thin-cursor.lua: update comments

plugins/degesch/thin-cursor.lua

@@ -15,13 +15,14 @@
 -- OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 -- CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 --
-
--- If tmux doesn't work, add the following to the configuration and reload it:
+-- If tmux doesn't work, add the following to its configuration:
 --   set -as terminal-overrides ',*:Ss=\E[%p1%d q:Se=\E[2 q'
 -- Change the "2" as per http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
 
 local out = io.output ()
 out:write ("\x1b[6 q"):flush ()
+
+-- By registering a global variable, we get notified about plugin unload
 x = setmetatable ({}, { __gc = function ()
 	out:write ("\x1b[2 q"):flush ()
 end })