Great!
I also have a similar fileOutAllMessages for StringHolder.
(unpublished because StringHolder stinks, and because a recent change
make it auto select 1 item)

Nicolas

2010/6/30  <commits at source.squeak.org>:
> Eliot Miranda uploaded a new version of Monticello to project The Trunk:
> http://source.squeak.org/trunk/Monticello-eem.396.mcz
>
> ==================== Summary ====================
>
> Name: Monticello-eem.396
> Author: eem
> Time: 29 June 2010, 6:30:15.515 pm
> UUID: 4bfae8e6-8254-4d67-8f17-5317a3cf4cb0
> Ancestors: Monticello-ar.395
>
> Make sure MCWorkingCopy receives system change
> notifications by reregistering for them on startup.
>
> File-out-all for PatchBrowser (package changes).
>
> =============== Diff against Monticello-ar.395 ===============
>
> Item was changed:
>  ----- Method: MCWorkingCopy class>>initialize (in category 'as yet unclassified') -----
>  initialize
>        Smalltalk
>                at: #MczInstaller
>                ifPresent: [:installer | self adoptVersionInfoFrom: installer].
>        self updateInstVars.
>        "Temporary conversion code -- remove later"
>        registry ifNotNil:[registry rehash]. "changed #="
>        self allInstancesDo:[:each| "moved notifications"
>                Smalltalk at: #SystemChangeNotifier ifPresent:[:cls|
>                        cls uniqueInstance noMoreNotificationsFor: each.
>                ].
>        ].
> +       self registerForNotifications.
> +       Smalltalk addToStartUpList: self!
> -       self registerForNotifications.!
>
> Item was added:
> + ----- Method: MCPackageManager class>>reregisterForNotificationsWith: (in category 'system changes') -----
> + reregisterForNotificationsWith: aSystemChangeNotifier
> +       aSystemChangeNotifier
> +               notify: self ofSystemChangesOfItem: #class change: #Added using: #classModified:;
> +               notify: self ofSystemChangesOfItem: #class change: #Modified using: #classModified:;
> +               notify: self ofSystemChangesOfItem: #class change: #Renamed using: #classModified:;
> +               notify: self ofSystemChangesOfItem: #class change: #Commented using: #classModified:;
> +               notify: self ofSystemChangesOfItem: #class change: #Recategorized using: #classMoved:;
> +               notify: self ofSystemChangesOfItem: #class change: #Removed using: #classRemoved:;
> +               notify: self ofSystemChangesOfItem: #method change: #Added using: #methodModified:;
> +               notify: self ofSystemChangesOfItem: #method change: #Modified using: #methodModified:;
> +               notify: self ofSystemChangesOfItem: #method change: #Recategorized using: #methodMoved:;
> +               notify: self ofSystemChangesOfItem: #method change: #Removed using: #methodRemoved:!
>
> Item was changed:
>  ----- Method: MCCodeTool>>methodListMenu: (in category 'menus') -----
>  methodListMenu: aMenu
>        "Build the menu for the selected method, if any."
>
> +       self selectedMessageName
> +       ifNil: [items notEmpty ifTrue:
> +               [aMenu addList:#(('fileOut (o)'                                 fileOutMessage))]]
> +       ifNotNil: [
> -       self selectedMessageName ifNotNil: [
>        aMenu addList:#(
>                        ('browse full (b)'                                              browseMethodFull)
>                        ('browse hierarchy (h)'                                 classHierarchy)
>                        ('browse method (O)'                                    openSingleMessageBrowser)
>                        ('browse protocol (p)'                                  browseFullProtocol)
>                        -
>                        ('fileOut (o)'                                                  fileOutMessage)
>                        ('printOut'                                                             printOutMessage)
>                        ('copy selector (c)'                                            copySelector)).
>                aMenu addList: #(
>                        -
>                        ('browse senders (n)'                                           browseSendersOfMessages)
>                        ('browse implementors (m)'                                      browseMessages)
>                        ('inheritance (i)'                                              methodHierarchy)
>                        ('versions (v)'                                                 browseVersions)
>                ('change sets with this method'                 findMethodInChangeSets)
>  "             ('x revert to previous version'                         revertToPreviousVersion)"
>                ('remove from current change set'               removeFromCurrentChanges)
>  "             ('x revert & remove from changes'               revertAndForget)"
>                ('add to current change set'                            adoptMessageInCurrentChangeset)
>  "             ('x copy up or copy down...'                            copyUpOrCopyDown)"
>  "             ('x remove method (x)'                                  removeMessage)"
>                "-"
>                ).
>        ].
>  "     aMenu addList: #(
>                        ('x inst var refs...'                                           browseInstVarRefs)
>                        ('x inst var defs...'                                           browseInstVarDefs)
>                        ('x class var refs...'                                          browseClassVarRefs)
>                        ('x class variables'                                            browseClassVariables)
>                        ('x class refs (N)'                                                     browseClassRefs)
>        ).
>  "
>        ^ aMenu
>  !
>
> Item was changed:
>  ----- Method: MCPackageManager class>>registerForNotifications (in category 'system changes') -----
>  registerForNotifications
> +       Smalltalk
> +               at: #SystemChangeNotifier
> +               ifPresent:
> +                       [:cls|
> +                       cls uniqueInstance noMoreNotificationsFor: self.
> +                       self reregisterForNotificationsWith: cls uniqueInstance]!
> -       Smalltalk at: #SystemChangeNotifier ifPresent:[:cls|
> -       (cls uniqueInstance)
> -               noMoreNotificationsFor: self;
> -               notify: self ofSystemChangesOfItem: #class change: #Added using: #classModified:;
> -               notify: self ofSystemChangesOfItem: #class change: #Modified using: #classModified:;
> -               notify: self ofSystemChangesOfItem: #class change: #Renamed using: #classModified:;
> -               notify: self ofSystemChangesOfItem: #class change: #Commented using: #classModified:;
> -               notify: self ofSystemChangesOfItem: #class change: #Recategorized using: #classMoved:;
> -               notify: self ofSystemChangesOfItem: #class change: #Removed using: #classRemoved:;
> -               notify: self ofSystemChangesOfItem: #method change: #Added using: #methodModified:;
> -               notify: self ofSystemChangesOfItem: #method change: #Modified using: #methodModified:;
> -               notify: self ofSystemChangesOfItem: #method change: #Recategorized using: #methodMoved:;
> -               notify: self ofSystemChangesOfItem: #method change: #Removed using: #methodRemoved:
> -       ].!
>
> Item was added:
> + ----- Method: MCWorkingCopy class>>startUp: (in category 'system startup') -----
> + startUp: resuming
> +       "Ensure Monticello is receiving system change notifications."
> +
> +       resuming ifTrue:
> +               [Smalltalk
> +                       at: #SystemChangeNotifier
> +                       ifPresent: [:scn| self reregisterForNotificationsWith: scn uniqueInstance]]
> + !
>
> Item was changed:
>  ----- Method: MCCodeTool>>fileOutMessage (in category 'menus') -----
>  fileOutMessage
>        "Put a description of the selected message on a file"
>
> +       | fileName |
>        self selectedMessageName ifNotNil:
>                [Cursor write showWhile:
> +                       [self selectedClassOrMetaClass fileOutMethod: self selectedMessageName].
> +                ^self].
> +       items isEmpty ifTrue:
> +               [^self].
> +       fileName := UIManager default request: 'File out on which file?' initialAnswer: 'methods'.
> +       Cursor write showWhile:
> +               [| internalStream |
> +               internalStream := WriteStream on: (String new: 1000).
> +               internalStream header; timeStamp.
> +               items do:
> +                       [:patchOp|
> +                       patchOp definition isMethodDefinition ifTrue:
> +                               [(patchOp definition actualClass notNil
> +                                 and: [patchOp definition actualClass includesSelector: patchOp definition selector])
> +                                       ifTrue:
> +                                               [patchOp definition actualClass
> +                                                       printMethodChunk: patchOp definition selector
> +                                                       withPreamble: true
> +                                                       on: internalStream
> +                                                       moveSource: false
> +                                                       toFile: nil]
> +                                       ifFalse:
> +                                               [internalStream nextChunkPut: patchOp definition className, ' removeSelector: ', patchOp definition selector printString]].
> +                       patchOp definition isClassDefinition ifTrue:
> +                               [patchOp definition actualClass
> +                                       ifNotNil:
> +                                               [internalStream nextChunkPut: patchOp definition actualClass definition.
> +                                                patchOp definition comment ifNotNil:
> +                                                       [patchOp definition actualClass organization
> +                                                               putCommentOnFile: internalStream
> +                                                               numbered: 1
> +                                                               moveSource: false
> +                                                               forClass: patchOp definition actualClass]]
> +                                       ifNil:
> +                                               [internalStream nextChunkPut: patchOp definition className, ' removeFromSystem']]].
> +               FileStream writeSourceCodeFrom: internalStream baseName: fileName isSt: true useHtml: false]!
> -                       [self selectedClassOrMetaClass fileOutMethod: self selectedMessageName]]!
>
>
>
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