The FixUnderscores package was known to break stuff in some cases, because 
it didn't parse the code but just replaced strings in methods. I don't 
know if that's still the case or not, but a few years ago, I wrote a 
better tool: http://smalltalkhub.com/#!/~ul/SourceCodeFixer

Levente

On Mon, 7 Aug 2017, Chris Muller wrote:

> Hi Tim,
>
> Please use the FixUnderscores package (on SqueakMap) to fix underscores.
> It takes care of an entire package at a time, and preserves the
> original author and timestamp information of the changed methods.
>
> Thanks.
>
> On Mon, Aug 7, 2017 at 6:42 PM,  <commits at source.squeak.org> wrote:
>> tim Rowledge uploaded a new version of Nebraska to project The Trunk:
>> http://source.squeak.org/trunk/Nebraska-tpr.49.mcz
>>
>> ==================== Summary ====================
>>
>> Name: Nebraska-tpr.49
>> Author: tpr
>> Time: 7 August 2017, 4:42:46.935605 pm
>> UUID: 867ebd6a-962c-4bee-be61-21636ad6c4b4
>> Ancestors: Nebraska-ul.48
>>
>> Correct an ancient underscore assignment
>>
>> =============== Diff against Nebraska-ul.48 ===============
>>
>> Item was changed:
>>   ----- Method: NebraskaCommunicatorMorph>>textEntryFieldNamed:with:help: (in category 'as yet unclassified') -----
>>   textEntryFieldNamed: aSymbol with: aString help: helpString
>>
>>         | f col |
>> +       f := (StringMorph new contents: aString; font: Preferences standardEToysFont; yourself)
>> -       f _ (StringMorph new contents: aString; font: Preferences standardEToysFont; yourself)
>>                 setBalloonText: helpString;
>>                 on: #mouseUp send: #editEvent:for: to: self.
>>         self field: aSymbol is: f.
>>         col _ (self inAColumn: {f}) color: Color white; hResizing: #shrinkWrap.
>>         ^col!
>>
>> Item was changed:
>>   ----- Method: NebraskaListenerMorph class>>removeAllFromGlobalIncomingQueue (in category 'as yet unclassified') -----
>>   removeAllFromGlobalIncomingQueue
>>
>>         self critical: [
>> +               GlobalIncomingQueue := OrderedCollection new.
>> -               GlobalIncomingQueue _ OrderedCollection new.
>>                 self bumpUpdateCounter.
>>         ].!
>>
>>