Make tests less istreambuf_iterator implementation dependent

[François Dumont]

Hi

 Â Â Â  I just committed attached patch as trivial.

 Â Â Â  Those tests were highly istreambuf_iterator implementation, it is 
the result of the call to money_get<>::get which is pointing immediately 
beyond the last character recognized to quote Standard words.

2017-09-27  François Dumont  <fdumont@gcc.gnu.org>

 Â Â Â  * testsuite/22_locale/money_get/get/char/22131.cc: Make test less
 Â Â Â  istreambuf_iterator implementation dependent.
 Â Â Â  * testsuite/22_locale/money_get/get/wchar_t/22131.cc: Likewise.

François

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