Levente Uzonyi uploaded a new version of Network to project The Trunk:
http://source.squeak.org/trunk/Network-ul.248.mcz

==================== Summary ====================

Name: Network-ul.248
Author: ul
Time: 3 September 2021, 3:49:34.525299 pm
UUID: 8df9c093-0687-4271-b36e-829e38b2578c
Ancestors: Network-mt.247

- ifNotNilDo: -> ifNotNil:

=============== Diff against Network-mt.247 ===============

Item was changed:
  ----- Method: MailMessage>>attachments (in category 'multipart') -----
  attachments
  
  	^ self body parts select: [:p | 
  		(p fieldNamed: 'content-disposition' ifAbsent: [nil])
  			ifNil: [false]
+ 			ifNotNil: [:headerValue | headerValue mainValue = 'attachment' ]]!
- 			ifNotNilDo: [:headerValue | headerValue mainValue = 'attachment' ]]!