fix(series/creation/validation-admin.robot): fix too long line.

Correction for 5eb1bdf commit.

Addressed to #761

Author: php-coder

src/test/robotframework/series/creation/validation-admin.robot

@@ -127,8 +127,11 @@ Invalid Catalog Numbers Should Be Rejected
 	Input Text                     id=yvertNumbers  ${catalogNumbers}
 	Input Text                     id=gibbonsNumbers  ${catalogNumbers}
 	Submit Form                    id=add-series-form
+	${alnumMessage}                Catenate  SEPARATOR=${SPACE}
+	...                            Value must be a list of numbers separated by comma.
+	...                            Any number may end with a latin letter in lower case
 	Element Text Should Be         id=michelNumbers.errors   Value must be a list of numbers separated by comma
-	Element Text Should Be         id=scottNumbers.errors    Value must be a list of numbers separated by comma. Any number may end with a latin letter in lower case
+	Element Text Should Be         id=scottNumbers.errors    ${alnumMessage}
 	Element Text Should Be         id=yvertNumbers.errors    Value must be a list of numbers separated by comma
 	Element Text Should Be         id=gibbonsNumbers.errors  Value must be a list of numbers separated by comma