Give QLocale::uiLanguages() a separator parameter

It has always returned dash-joined forms of the locale names, and
callers who need an underscore-joined form have been obliged to
replace('-', '_') before using them. Given that everything it adds to
the list comes from QLocaleId methods that accept a separator, it's
trivial to let it offer the same choice to its callers and save them
this hassle.

Amended code in QTranslater and QMimeType to save them that hassle.

[ChangeLog][CoreLib][QLocale] QLocale::uiLanguages() now lets the
caller choose what separator to use between the tags that make up each
locale-identifier in the list returned.

Change-Id: I91fcd0b988d9a64e0e9ad9e851f6cb8c1be8ae50
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/auto/corelib/kernel/qtranslator/tst_qtranslator.cpp b/tests/auto/corelib/kernel/qtranslator/tst_qtranslator.cpp
index 372a7a9db1..f534389c2b 100644
--- a/tests/auto/corelib/kernel/qtranslator/tst_qtranslator.cpp
+++ b/tests/auto/corelib/kernel/qtranslator/tst_qtranslator.cpp
@@ -119,7 +119,7 @@ void tst_QTranslator::load()
 void tst_QTranslator::loadLocale()
 {
     QLocale locale;
-    auto localeName = locale.uiLanguages().value(0).replace('-', '_');
+    auto localeName = locale.uiLanguages(QLocale::TagSeparator::Underscore).value(0);
     if (localeName.isEmpty())
         QSKIP("This test requires at least one available UI language.");