More work on repeated string summarization.

internal/punctuation/profile.go

@@ -159,8 +159,8 @@ func (p *Processor) Character(char rune) string {
 
 // Text retains Python's levels and pause handling. At some and most, symbols
 // embedded between letters or numbers are also named, except apostrophes in
-// contractions and single numeric separators. Sentence punctuation still follows
-// the selected level.
+// contractions and single numeric separators. A percent sign after a digit is
+// also named at some and most. Sentence punctuation follows the selected level.
 func (p *Processor) Text(text, level string) string {
 	selected := p.levels[level]
 	var result strings.Builder
@@ -187,7 +187,8 @@ func (p *Processor) Text(text, level string) string {
 			}
 		}
 		_, known := p.symbols[char]
-		if selected[char] || embedded && known {
+		percentage := (level == "some" || level == "most") && char == '%' && index > 0 && unicode.IsDigit(chars[index-1])
+		if selected[char] || (embedded || percentage) && known {
 			result.WriteByte(' ')
 			result.WriteString(p.Character(char))
 			if strings.ContainsRune("',.;:?!", char) {