Update TODO.

TODO

@@ -148,90 +148,7 @@
 TODO soonish maybe:
 
 - Horizontal cursor position is incorrect after resize (bug), issue 1323.
-- Multiple status lines:
-
-       1) Extend formats to include some way to loop over every window
-          (or pane or session), perhaps something like
-          #{W:#{window_name} }.  It would need to be able to reach
-          into a window's options in order to allow different windows
-          to have different format. (DONE) An operator to evaluate an
-          option value as a format, maybe make it so E: on evaluates
-          the result as a format again something like, so end up with
-          something like #{W:#{E:window-status-format} }
-
-       2) Some way to include alignment information for part of a format.
-
-       3) Then the entire status line can be drawn with one option,
-          instead of status-left/status-right. But how to stay
-          backwards compatible, even slightly? Can probably keep
-          status-left and right and the default status-format becomes
-          something like (plus some bits for current window):
-
-	  #{L:#{E:status-left} #{M:#{W:{E:window-status-format}}} #{R:#{E:status-right}}
-
-	  Where L = left, M = middle, R = right; W = for each window;
-	  E = get option value and evaluate as format.
-
-       4) Also need a way to return mouse positioning, so a format
-          like the alignment that stores the offset/size for
-          Mouse*Status{Left,Right}.
-
-       5) Likewise, styles. Alignment, mouse, styles can all be done
-          similarly - format_expand can be given the available width
-          and then build a list of format_range with type (ALIGN_LEFT,
-          STYLE, MOUSE_LEFT and so on) which a format_draw function
-          can use to draw the format, and can be stored to be used by
-          the mouse positioning check code.
-
-(DONE) 6) status-left-length and similar will need to be taken into
-          account.
-
-       7) Supporting trimming the window list and adding <> might be
-          tricky, probably a second pass over the format_range list to
-          trim as appropriate. But it will need to know which element
-          to trim first, so some way to mark that is needed (maybe a
-          priority or something in the alignment/length limit).
-
-(DONE) 8) Formats are going to get very long so perhaps standardize
-          them a bit so they are all something like #{F/argument:text}
-          then then could be #{A/foo;B/bar:text} rather than
-          #{A:foo,#{B:bar,text}} and so on. Need to keep the old style
-          for compatibility, at least for the most popular formats. So
-          the status-left part would be something like:
-
-	  	    #{A/left;S/#{status-left-style};M/left;=/#{status-left-length};E:status-left}
-
-          Where A = alignment, S = style, M = mouse, = = length limit,
-          E = expand again.
-
-	  Existing formats are:
-
-	  	   #{l:foo} <-- literal
-		   #{m:foo} <-- match
-		   #{C:foo} <-- search
-		   #{b:foo} <-- basename
-		   #{d:foo} <-- dirname
-		   #{t:foo} <-- time
-		   #{q:foo} <-- quote
-		   #{s/a/b/:foo} <-- sub
-	           #{=123:foo} <-- length
-
-		   #{||:foo,bar} <-- or
-		   #{&&:foo,bar} <-- and
-		   #{!=:foo,bar} <-- neq
-		   #{==:foo,bar} <-- eq
-		   #{?foo,bar,baz} <-- if
-
-           So comparisons and ? can stay as they are.
-
-           All other formats can be parsed as #{X/arg1/arg2/arg3:...}
-           with an optional leading and trailing /. Each argument can
-           be expanded.
-
-       9) Then status-format can be an array option specifying
-          multiple status lines. Perhaps one option for top and one
-          for bottom.
-
+- Multiple status lines (DONE but not committed yet).
 - Store hooks as options, issue 1619.
 - Support buffer prefixes, issue 1501.
 - copy-pipe should be synchronous, issue 1517.
@@ -242,7 +159,6 @@ TODO soonish maybe:
   silly really though), reflow performance (can reflow blocks on
   demand). It would possibly be good if history-limit could be global
   and collected LRU.
-- Array options should be a tree rather than being sparse.
 - Formats to get the default formats for various things, notably
   choose-tree. GitHub issue 1634.
 - Command aliases should be able to override builtin commands in order to add