add space-separators between sets

Author: eugenesvk

SPEC.md

@@ -881,11 +881,11 @@ string-character := '\\' (["\\bfnrts] | 'u{' hex-unicode '}') | ws-escape | [^\\
 ws-escape := '\\' (unicode-space | newline)+
 hex-digit := [0-9a-fA-F]
 hex-unicode := hex-digit{1, 6} - surrogate - above-max-scalar  // Unicode Scalar Value in hex₁₆, leading 0s allowed within length ≤ 6
-surrogate := [0]{0,2}[dD][8-9a-fA-F]hex-digit{2}
-//  U+D800-DFFF:       D  8         00
-//                     D  F         FF
-above-max-scalar = [2-9a-fA-F]hex-digit{5} | [1][1-9a-fA-F]hex-digit{4}
-// >U+10FFFF:      >1         _____           1 >0         ____
+surrogate := [0]{0, 2} [dD] [8-9a-fA-F] hex-digit{2}
+//  U+D800-DFFF:         D   8          00
+//                       D   F          FF
+above-max-scalar = [2-9a-fA-F] hex-digit{5} | [1] [1-9a-fA-F] hex-digit{4}
+// >U+10FFFF:      >1          _____           1  >0          ____
 
 
 raw-string := '#' raw-string-quotes '#' | '#' raw-string '#'