collections: update 6.1 printStrings for dictionaries #572

Job	Run time
📄 Collect listings from SmalltalkSources	10s
📄 Collect listings from SmalltalkSources	10s
📦 Prepare arguments	1s
📦 Prepare arguments	1s
🧪 @TEST assertions [Trunk]	32s
🧪 @TEST assertions [Trunk]	32s
🧪 @TEST assertions [6.0]	31s
🧪 @TEST assertions [6.0]	31s
🐞 Internal tests [Trunk]	39s
🐞 Internal tests [Trunk]	39s
🐞 Internal tests [6.0]	28s
🐞 Internal tests [6.0]	28s
📖 Build book [Trunk]	7m 53s
📖 Build book [Trunk]	7m 5s
📖 Build book [6.0]	6m 19s
📖 Build book [6.0]	6m 19s
📣 Notify community on failure	6s
📣 Notify community on failure	4s
Create release	0s
Create release	0s
	32m 28s

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