QFontDatabase: store Vietnamese writingSystemSample() in UTF-16

The old code stored it in UTF-8 with an encoded BOM.

Using the new QString::op+=(QStringView), we can store
the string, without the BOM, in ten instead of 15 bytes.

Change-Id: Ia1c51da523fcd6298b39bf2ec162a49c7cfdda63
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 1 insertions, 9 deletions

diff --git a/src/gui/text/qfontdatabase.cpp b/src/gui/text/qfontdatabase.cpp
index 75a0171aab..c511ec897b 100644
--- a/src/gui/text/qfontdatabase.cpp
+++ b/src/gui/text/qfontdatabase.cpp
@@ -2213,16 +2213,8 @@ QString QFontDatabase::writingSystemSample(WritingSystem writingSystem)
         sample += QChar(0xac2f);
         break;
     case Vietnamese:
-    {
-        static const char vietnameseUtf8[] = {
-            char(0xef), char(0xbb), char(0xbf), char(0xe1), char(0xbb), char(0x97),
-            char(0xe1), char(0xbb), char(0x99),
-            char(0xe1), char(0xbb), char(0x91),
-            char(0xe1), char(0xbb), char(0x93),
-        };
-        sample += QString::fromUtf8(vietnameseUtf8, sizeof(vietnameseUtf8));
+        sample += u"\x1ED7\x1ED9\x1ED1\x1ED3";
         break;
-    }
     case Ogham:
         sample += QChar(0x1681);
         sample += QChar(0x1682);