all: remove repetitive words

Change-Id: I496265fcad6dee919eff6fc1fbcf9121ae61730f
Reviewed-on: https://go-review.googlesource.com/c/text/+/509855
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>

language/match.go

@@ -434,7 +434,7 @@ func newMatcher(supported []Tag, options []MatchOption) *matcher {
 	// (their canonicalization simply substitutes a different language code, but
 	// nothing else), the match confidence is Exact, otherwise it is High.
 	for i, lm := range language.AliasMap {
-		// If deprecated codes match and there is no fiddling with the script or
+		// If deprecated codes match and there is no fiddling with the script
 		// or region, we consider it an exact match.
 		conf := Exact
 		if language.AliasTypes[i] != language.Macro {

secure/precis/gen.go

@@ -221,12 +221,12 @@ func isLetterDigits(r rune) bool {
 func isIdDisAndFreePVal(r rune) bool {
 	return unicode.In(r,
 		// OtherLetterDigits: https://tools.ietf.org/html/rfc7564#section-9.18
-		// r in in {Lt, Nl, No, Me}
+		// r in {Lt, Nl, No, Me}
 		unicode.Lt, unicode.Nl, unicode.No, // Other letters / numbers
 		unicode.Me, // Modifiers
 
 		// Spaces: https://tools.ietf.org/html/rfc7564#section-9.14
-		// r in in {Zs}
+		// r in {Zs}
 		unicode.Zs,
 
 		// Symbols: https://tools.ietf.org/html/rfc7564#section-9.15