449052: Typo in Method name in StringUtility 

Change-Id: Ic0099a39e9364017fe115b8e4a3a493a076d54b3
Task-Url: https://bugs.eclipse.org/bugs/show_bug.cgi?id=449052
Signed-off-by: Samuel Renold <sre@bsiag.com>
Reviewed-on: https://git.eclipse.org/r/35750
Tested-by: Hudson CI
Reviewed-by: Judith Gull <jgu@bsiag.com>