Fix error message spelling

pkg/config/config.go

@@ -83,7 +83,7 @@ func (s *Settings) UnmarshalYAML(n *yaml.Node) error {
 	}
 
 	if data.ValidityYears.Root < data.ValidityYears.Intermediary {
-		return SettingsError{"validity of root CA certificates must be equal or greater than those if" +
+		return SettingsError{"validity of root CA certificates must be equal or greater than those of" +
 			" intermediary CA certificates"}
 	}
 

pkg/config/config_test.go

@@ -746,8 +746,8 @@ url-patterns:
   crl: http://crl.example.org/%s.crl
   issuer: http://issuer.example.org/%s.crt
 `,
-			errMsg: "invalid Settings validity of root CA certificates must be equal or greater than " +
+			errMsg: "invalid Settings validity of root CA certificates must be equal or greater than" +
-				"those of intermediary CA certificates",
+				" those of intermediary CA certificates",
 		},
 		"no OCSP pattern": {
 			yaml: `