Nice observation.
Why don't we just get rid of it and use mappend now?

-- Don

vogt.adam:
> Sat Dec  5 18:36:11 EST 2009  Adam Vogt 
>   * Generalize the type of (<+>). It can be used for keybindings too.

Content-Description: A darcs patch for your repository!
> 
> New patches:
> 
> [Generalize the type of (<+>). It can be used for keybindings too.
> Adam Vogt **20091205233611
>  Ignore-this: af15248be5e483d1a6e924f786fcc1c4
> ] hunk ./XMonad/ManageHook.hs 40
>  idHook :: ManageHook
>  idHook = doF id
>  
> --- | Compose two 'ManageHook's.
> -(<+>) :: ManageHook -> ManageHook -> ManageHook
> +-- | Infix 'mappend'. Compose two 'ManageHook' from right to left.
> +(<+>) :: Monoid m => m -> m -> m
>  (<+>) = mappend
>  
>  -- | Compose the list of 'ManageHook's.
> 
> Context:
> 
> [Swap the order that windows are mapped/unmapped.  Addresses #322
> Spencer Janssen **20091119025440
>  Ignore-this: 22087204f1b84dae98a3cf2b7f116d3f
> ] 
> [Add GPL warning to GenerateManpage
> Spencer Janssen **20091111000106
>  Ignore-this: ea24691b8198976a4088a2708e0b4c94
> ] 
> [Add a basic header to the html manpage output
> Adam Vogt **20091028033042
>  Ignore-this: 2641e0fb3179616075fa7549b57740f3
> ] 
> [Use pandoc to convert a markdown manpage tranlation to html and man.
> Adam Vogt **20091028030639
>  Ignore-this: cdf7cdc8e44b21de8fc7725bde299792
> ] 
> [Support for extensible state in contrib modules.
> Daniel Schoepe **20091106115050
>  Ignore-this: d04ee1989313ed5710c94f9d7fda3f2a
> ] 
> [Set SIGPIPE to default in forked processes
> Spencer Janssen **20091106223743
>  Ignore-this: f73943e4fe6c5f08967ddb82afad3eaa
> ] 
> [TAG 0.9
> Spencer Janssen **20091026004641
>  Ignore-this: 80347d432f3b606c8d722536d0d729aa
> ] 
> [Bump version to 0.9
> Spencer Janssen **20091026004543
>  Ignore-this: 494efab8313c37c2b1297e92a4896b5c
> ] 
> [Grab the xmonad.cabal version for putting into the manpage
> Adam Vogt **20091024200920
>  Ignore-this: 574565100ef9198588dcc36b4262a07f
> ] 
> [Correct formatting in manpage
> Adam Vogt **20091024200748
>  Ignore-this: e142a576042f5977e5436ee280bec59c
> ] 
> [depend on X11 >= 1.4.6.1, for conformity with XMC
> Don Stewart **20091024212409] 
> [Fix for Tall documentation
> Khudyakov Alexey **20090516104753
>  Ignore-this: ba56921cc5b3be0462c41d10499ccf0e
> ] 
> [correct a comment
> Daniel Wagner **20090727032024
>  Ignore-this: abbf4269b4161c4e6cf375ab2c8892da
> ] 
> [man/xmonad.hs is in data-files, remove it from extra-source-files
> Spencer Janssen **20091023031457
>  Ignore-this: d201a7c16f68213c7de62481ea7f5b4f
> ] 
> [Add the template config as distributed file.
> Adam Vogt **20091022041402
>  Ignore-this: 2c3ef853ecc0a0d037dd0dfb3087ce99
> ] 
> [Note in manpage that 'exec xmonad' should be used
> Adam Vogt **20090901040538
>  Ignore-this: 5c829442916c7390fc80e836272c6933
> ] 
> [Manual page spelling: maximise -> maximize, utilising -> utilizing
> Adam Vogt **20090901040217
>  Ignore-this: 59cce0620bdb28147dbb3032fbec73a9
> ] 
> [Describe modular configuration in the manual page
> Adam Vogt **20090901040046
>  Ignore-this: 4f4832d44d86773d1f81cb86026811b1
> ] 
> [Remove redundant parens
> Spencer Janssen **20090918035547
>  Ignore-this: aefa46cdb3ad8496e20d15a7e6b5fa52
> ] 
> [man_xmonad.hs: import Data.Monoid for mempty, keybinding edits
> wirtwolff@gmail.com**20090320024624
>  Ignore-this: dc8477ffcfdd404f4f60d2cdaf3812d9
>  Bring mempty into scope. Add commented ToggleStruts binding.
>  Replace shadowed modMask in keybindings with modm instead.
> ] 
> [Only watch mtime for .hs, .lhs, .hsc for ~/.xmonad/lib
> Adam Vogt **20090503235415
>  Ignore-this: e3b1847edf3e07a8182f7fcfc23b00c8
>  
>  Previously xmonad would force a recompile due to the object files being too
>  new, so only look at files which may contain haskell code.
> ] 
> [Add lib to ghc searchpath with recompilation check
> Adam Vogt **20090321232907
>  Ignore-this: 8827fb02fe1101d7b66f05d363bef038
> ] 
> [Remove tabs from ManageHook.hs
> Adam Vogt **20090710011424
>  Ignore-this: 13903f39b052c025a7bfa50fb701959c
> ] 
> [Set infix 0 --> to reduce parentheses in ManageHooks
> Adam Vogt **20090710011308
>  Ignore-this: 75804147fffeceddd328869cbca0d20f
>  
>  What was previously:
>  > (appName ?= x <&&> classname ?= y) --> (doFloat <+> doIgnore)
>  
>  Can now be:
>  > appName ?= x <&&> classname ?= y --> doFloat <+> doIgnore
> ] 
> [Pester the user with one (not two) xmessages on config errors
> Adam Vogt **20090321233736
>  Ignore-this: f481f7d3ba5fca5c53a0b3a87daa32bb
> ] 
> [Minor bugfix in the creation of new StackSets.
> Wouter Swierstra **20090503154321] 
> [Avoid deadly cycle in man/xmonad.hs
> Spencer Janssen **20090319081918
>  Ignore-this: adcba110caad465a2cbb4b9dca7cb612
> ] 
> [X.Config.hs, ./man/xmonad.hs: update Event Hook doc
> wirtwolff@gmail.com**20090209183837
>  Ignore-this: 3792043278932e371e3e2858913a2b17
> ] 
> [Use records to document Tall's arguments
> Spencer Janssen **20090221230628
>  Ignore-this: 253c09de793715c18a029406795a42fd
> ] 
> [Fix possible head []
> Joachim Breitner **20090106192026
>  This seems to be a rare case, but I just got hit by it.
> ] 
> [ManageHook.doShift: use shiftWin instead of shift
> Spencer Janssen **20090219041458
>  Ignore-this: 4d7f348d6d394c581ab2809bbc45a2c6
> ] 
> [Express shift in terms of shiftWin
> Spencer Janssen **20090217235343
>  Ignore-this: 8f213bca20065a39e7c16027f7b398cf
> ] 
> [Use standard -fforce-recomp instead of undocumented -no-recomp
> Don Stewart **20090208165518] 
> [Support for custom event hooks
> Daniel Schoepe **20090203155536
>  Ignore-this: f22f1a7ae2d958ba1b3625aa923b7efd
> ] 
> [Make X an instance of Typeable
> Daniel Schoepe **20090128215406
>  Ignore-this: bb155e62ea4e451460e3b94508dc49d2
> ] 
> [Add uninstallSignalHandlers, use in spawn
> Spencer Janssen **20090122002643
>  Ignore-this: d91bde6f965341a2619fe2dde83cc099
> ] 
> [Create a new session for forked processes
> Spencer Janssen **20090122000423
>  Ignore-this: f5d9cf254a0b07ddbf204457b7783880
> ] 
> [TAG 0.8.1
> Spencer Janssen **20090118083910] 
> [Close stdin in spawned processes
> Spencer Janssen **20090117040024
>  Ignore-this: 2e372ed6215160adae8da1c44cdede3d
> ] 
> [Document spawnPID
> Spencer Janssen **20090117035907
>  Ignore-this: 1641bdcf5055b2ec7b9455265f5b1d52
> ] 
> [Asynchronously recompile/restart xmonad on mod-q
> Spencer Janssen **20090117035300
>  Ignore-this: 753d8746034f818b81df79003ae5ee0d
> ] 
> [Add --restart, a command line flag to cause a running xmonad process to restart
> Spencer Janssen **20090117034959
>  Ignore-this: 45c8c8aba7cc7391b95c7e3fb01e5bf9
> ] 
> [Bump version to 0.8.1
> Spencer Janssen **20090116223621
>  Ignore-this: 2e8e9dc7b6ca725542f4afe04253dc57
> ] 
> [Remove doubleFork, handle SIGCHLD
> Spencer Janssen **20090116204742
>  Ignore-this: f9b1a65b4f0622922f80ad2ab6c5a52f
>  This is a rather big change.  Rather than make spawned processes become
>  children of init, we handle them in xmonad.  As a side effect of this change,
>  we never need to use waitForProcess in any contrib module -- in fact, doing so
>  will raise an exception.  The main benefit to handling SIGCHLD is that xmonad
>  can now be started with 'exec', and will correctly clean up after inherited
>  child processes.
> ] 
> [Main.hs: escape / in Haddocks
> gwern0@gmail.com**20081207020915
>  Ignore-this: 2c4525280fbe73c46f3abd8fc13628e9
>  This lets haddocks for Main.hs, at least, to build with 2.3.0.
> ] 
> [More flexible userCode function
> Daniel Schoepe **20090110221852] 
> [Call logHook as the very last action in windows
> Spencer Janssen **20081209233700
>  Ignore-this: 4396ad891b607780f8e4b3b6bbce87e
> ] 
> [Accept inferior crossing events.  This patch enables fmouse-focus-follows-screen
> Spencer Janssen **20081205045130
>  Ignore-this: 3ac329fb92839827aed0a4370784cabd
> ] 
> [Tile all windows at once
> Spencer Janssen **20081118074447] 
> [Factor rational rect scaling into a separate function
> Spencer Janssen **20081118072849] 
> [Change screen focus by clicking on the root window.
> Spencer Janssen **20081106224031
>  This is a modification of a patch from Joachim Breitner.
> ] 
> [Fix #192.
> Spencer Janssen **20081021220059] 
> [select base < 4 for building on ghc 6.10
> Adam Vogt **20081013214509] 
> [add killWindow function
> Joachim Breitner **20081005001804
>  This is required to kill anything that is not focused, without
>  having to focus it first.
> ] 
> [add'l documentation
> Devin Mullins **20080927234639] 
> [Regression: ungrab buttons on *non* root windows
> Spencer Janssen **20081007214351] 
> [Partial fix for #40
> Spencer Janssen **20081007212053
>  Improvements:
>   - clicking on the root will change focus to that screen
>   - moving the mouse from a window on a screen to an empty screen changes focus
>     to that screen
>  The only remaining issue is that moving the mouse between two empty screens
>  does not change focus.  In order to solve this, we'd have to select motion events
>  on the root window, which is potentially expensive.
> ] 
> [Track mouse position via events received
> Spencer Janssen **20081007203953] 
> [Fix haddock
> Spencer Janssen **20081007094641] 
> [Move screen locating code into pointScreen
> Spencer Janssen **20081007094207] 
> [Make pointWithin a top-level binding
> Spencer Janssen **20081007090229] 
> [sp README, CONFIG, STYLE, TODO
> gwern0@gmail.com**20080913024457] 
> [Use the same X11 dependency as xmonad-contrib
> Spencer Janssen **20080921061508] 
> [Export focusUp' and focusDown' -- work entirely on stacks
> Spencer Janssen **20080911214803] 
> [add W.shiftMaster, fix float/tile-reordering bug
> Devin Mullins **20080911053909] 
> [TAG 0.8
> Spencer Janssen **20080905195412] 
> Patch bundle hash:
> 538423d0ff33bb346375248acfc4b5320f7d3483

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> xmonad@haskell.org
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