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The problem here is how GuiXT handles the space in variable values. The
string " " (one space) is ultimately handled the same way as the empty value "", and
groupseparator="" means: no group separator. You can use the following trick: Write
... GroupSeparator="&V[user_groupseparator] "
i.e. an additional space before the ending ".
Since the GroupSeparator takes the first character of the given string
only, V[user_groupseparator]="." then takes the '.' as group
separator, and V[user_groupseparator]="" or &V[user_groupseparator]="
" both lead to the "space" group separator that you want to have.
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