const unicode.pZ

4 uses

	unicode (current package)
		graphic.go#L13: 	pZ                 // a spacing character.
		graphic.go#L17: 	pg     = pp | pZ   // a graphical character according to the Unicode definition.
		tables.go#L7284: 	0x20: pZ | pp,  // ' '
		tables.go#L7412: 	0xA0: pZ,       // '\u00a0'