Bug in development.refactor.move_class when updating class path

[AntoineGautier]

The function _getShortName converts the class reference A.B.C.X.Y in the file A/B/C/D/E.mo into X.Y.
This is incorrect in the case where a subpackage X also exists under D (typically BaseClasses).
In that case the function should return C.X.Y.
However, the class reference A.B.C.D.X.Y should indeed be converted into X.Y.
So the logic is as follows.

1. Find the first element of the path that differs between the class and the file (X in the above example).

2. Test if a class with that name (X) exists at any level below, in reference to the file path (under A/B/C/D/. in the above example).

   • false: the short class name should start with that element (X).
   • true: the short class name should start with the prior element (C).

In addition, in the function _updateFile

        if "." in shortSource:
            replace_text_in_file(srcFil, shortSource, shortTarget, isRegExp=False)
        else:
            regExp = r"(?!\w)" + shortTarget
            replace_text_in_file(srcFil, regExp, shortTarget, isRegExp=True)

regExp = r"(?!\w)" + shortTarget should be regExp = r"(?!\w)" + shortSource.

EDIT: Also the negative lookahead assertion (?!\w) has no effect if not preceded with ^ for instance. So

re.sub(r'(?!\w) Class', ' Test', 'model Class')

returns model Test which is the undesired behavior. Better use the negative lookbehind assertion (?<!\w).