transform, unicode/cldr: spell "Deprecated: Use etc" consistently

Change-Id: I5194e58a7679e33555856a413f6081fea26d8e34
Reviewed-on: https://go-review.googlesource.com/c/text/+/171277
Reviewed-by: Dmitri Shuralyov <[email protected]>

Author: nigeltao

transform/transform.go

@@ -493,7 +493,7 @@ func (c *chain) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err erro
 	return dstL.n, srcL.p, err
 }
 
-// Deprecated: use runes.Remove instead.
+// Deprecated: Use runes.Remove instead.
 func RemoveFunc(f func(r rune) bool) Transformer {
 	return removeF(f)
 }

unicode/cldr/cldr.go

@@ -96,7 +96,7 @@ func (cldr *CLDR) RawLDML(loc string) *LDML {
 // LDML returns the fully resolved LDML XML for loc, which must be one of
 // the strings returned by Locales.
 //
-// Deprecated: use RawLDML and implement inheritance manually or using the
+// Deprecated: Use RawLDML and implement inheritance manually or using the
 // internal cldrtree package.
 // Inheritance has changed quite a bit since the onset of this package and in
 // practice data often represented in a way where knowledge of how it was