[Bug 53582] New: The Bat! macro has different results for %DATE on Windows and in wine

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=53582

Bug ID: 53582
           Summary: The Bat! macro has different results for %DATE on
                    Windows and in wine
           Product: Wine
           Version: 7.15
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

I got a strange effect in the application TheBat! which I maintain in AppDB:

Some Background:
TheBat! has an internal macro system to automate for example templates for
mails and so on. This macro system has a function called %DATE. As a parameter,
I can provide a "d" for the day on a date like this %DATE("ddd"). Three "d"s is
for the abbreviated weekday name. So "Saturday" gives me "Sa".

The Problem:
In Windows 10 64bit this %DATE("ddd") (or also possible: %DATE="ddd") results
in: Sa, which is ok.
On top of wine this %DATE("ddd") results in "Sa.", which means there is a dot
behind the uppercase letter S and the lowercase letter a.

This is really interesting, but not ok. The added point is the problem.

To get deeper into this problem and provide more info to you please give me
some input...