Add missing vim modelines in lib/

Signed-off-by: Uli Schlachter <psychon@znc.in>

lib/awful/client/urgent.lua

@@ -86,3 +86,5 @@ capi.client.connect_signal("focus", urgent.delete)
 capi.client.connect_signal("unmanage", urgent.delete)
 
 return urgent
+
+-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80

lib/awful/mouse/drag_to_tag.lua

@@ -56,3 +56,5 @@ resize.add_move_callback(function(c, _, _)
 end, "mouse.move")
 
 return setmetatable(module, {__call = function(_, ...) return module.drag_to_tag(...) end})
+
+-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80

lib/awful/mouse/resize.lua

@@ -227,3 +227,5 @@ local function handler(_, client, context, args) --luacheck: no unused_args
 end
 
 return setmetatable(module, {__call=handler})
+
+-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80

lib/awful/mouse/snap.lua

@@ -264,3 +264,5 @@ resize.add_leave_callback(function(c, _, args)
 end, "mouse.move")
 
 return setmetatable(module, {__call = function(_, ...) return module.snap(...) end})
+
+-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80

lib/gears/geometry.lua

@@ -238,3 +238,5 @@ function gears.geometry.rectangle.area_remove(areas, elem)
 end
 
 return gears.geometry
+
+-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80