Don't escape / in pretty-printed strings #3582

Job	Run time
Setup Build Matrix (true, ion-rust, windows, macos, ubuntu, al2-x86, al2-arm, windows, macos, ubu...	1s
Build and Test (windows, default)	4m 34s
Build and Test (windows, all)	6m 28s
Build and Test (windows, experimental-ion-hash)	5m 49s
Build and Test (windows, experimental)	5m 48s
Build and Test (macos, default)	2m 17s
Build and Test (macos, all)	2m 10s
Build and Test (macos, experimental-ion-hash)	2m 14s
Build and Test (macos, experimental)	3m 2s
Build and Test (ubuntu, default)	2m 13s
Build and Test (ubuntu, all)	4m 10s
Build and Test (ubuntu, experimental-ion-hash)	2m 27s
Build and Test (ubuntu, experimental)	2m 48s
Build and Test (al2-x86, default)	1m 34s
Build and Test (al2-x86, all)	2m 8s
Build and Test (al2-x86, experimental-ion-hash)	1m 49s
Build and Test (al2-x86, experimental)	1m 53s
Build and Test (al2-arm, default)	1m 39s
Build and Test (al2-arm, all)	2m 6s
Build and Test (al2-arm, experimental-ion-hash)	1m 54s
Build and Test (al2-arm, experimental)	1m 56s
Build and Test Confirmation	1s
	59m 1s

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