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Apparently checking the TextWordWrap property in DrawingML::WriteText()
gives false by default for objects that do not have it set, which happens
to be everything except for custom shapes, which seem to be the only ones
to actually obey it. So all normal text would be exported as nowrap to .pptx
and read back as custom shape that has non-wrapping text.
I tried to make the property return true (which is what it should be in practice),
but that appears to be an exercise in futility, or I'm not mad enough to follow
the complicated property sets and whatnot. So just write it out only for custom
shapes. UNO purists, if any, are welcome to change the dynamic_cast to something
UNO-better if they manage without an ambiguous base class error.
Change-Id: I3ed906285fde88d902ac9c801986a82a7515638b
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