Escape strings containing font glyphs (Nerd Font compatibility) #202

Job	Run time
Coverage	29s
Test in i386 (ubuntu-latest, 1.19)	12s
ycat	16s
Test with -race (ubuntu-latest, 1.19)	18s
Test in i386 (ubuntu-latest, 1.20)	26s
Test in i386 (ubuntu-latest, 1.21)	26s
Test with -race (ubuntu-latest, 1.20)	16s
Test in i386 (windows-latest, 1.19)	2m 1s
Test with -race (ubuntu-latest, 1.21)	33s
Test in i386 (windows-latest, 1.20)	2m 11s
Test with -race (macos-latest, 1.19)	26s
Test in i386 (windows-latest, 1.21)	1m 47s
Test with -race (macos-latest, 1.20)	36s
Test with -race (macos-latest, 1.21)	22s
Test with -race (windows-latest, 1.19)	2m 16s
Test with -race (windows-latest, 1.20)	59s
Test with -race (windows-latest, 1.21)	1m 24s
	14m 58s

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