lexer: IsSpace()

Signed-off-by: Alejandro Mery <amery@jpi.io>

lexer/runes.go

@@ -0,0 +1,9 @@
+package lexer
+
+import "unicode"
+
+// IsSpace reports whether the rune is a space character as
+// defined by Unicode's White Space property
+func IsSpace(r rune) bool {
+	return unicode.IsSpace(r)
+}