rename test class
Per default data fields are no more Learnable but still mutable.
add _str_debug method to display field structure
add _str_debug method to display field structure
Fix issues when only CompareFormat method is executed on data parsing
Add _str_debug method for variables nodes
add MergeFields static method in FormatEditor.
Add tutorial test for ManualFieldStatic
reference new doctests
reference the new tutorial test