Revert "Refine error message when validating extension name (#845)"

This reverts commit 005748c. Signed-off-by: nbajaj90 <nbajaj90@gmail.com>
cloudevents · Mar 15, 2023 · ca17907 · ca17907
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diff --git a/v2/event/extensions.go b/v2/event/extensions.go
@@ -50,7 +50,7 @@ func validateExtensionName(key string) error {
 
 	for _, c := range key {
 		if !((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9')) {
-			return errors.New("bad key, CloudEvents attribute names MUST consist of lower-case letters ('a' to 'z'), upper-case letters ('A' to 'Z') or digits ('0' to '9') from the ASCII character set")
+			return errors.New("bad key, CloudEvents attribute names MUST consist of lower-case letters ('a' to 'z') or digits ('0' to '9') from the ASCII character set")
 		}
 	}
 	return nil

diff --git a/v2/event/extensions_test.go b/v2/event/extensions_test.go