Escape strings containing font glyphs (Nerd Font compatibility) #200

Job	Run time
Coverage	33s
ycat	21s
Test in i386 (ubuntu-latest, 1.19)	27s
Test with -race (ubuntu-latest, 1.19)	28s
Test in i386 (ubuntu-latest, 1.20)	28s
Test with -race (ubuntu-latest, 1.20)	29s
Test in i386 (ubuntu-latest, 1.21)	24s
Test in i386 (windows-latest, 1.19)	1m 56s
Test with -race (ubuntu-latest, 1.21)	25s
Test with -race (macos-latest, 1.19)	40s
Test in i386 (windows-latest, 1.20)	2m 12s
Test in i386 (windows-latest, 1.21)	1m 41s
Test with -race (macos-latest, 1.20)	30s
Test with -race (macos-latest, 1.21)	59s
Test with -race (windows-latest, 1.19)	2m 14s
Test with -race (windows-latest, 1.20)	1m 24s
Test with -race (windows-latest, 1.21)	1m 51s
	17m 2s

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