Doc: make a note about use of QStringLiteral with non-ASCII chars

Both ICC and MSVC have bugs concatenating strings and that's despite the
standard giving an example ([lex.string] table 9) that says that
  u"a" "b"
is the same as
  u"ab"

We can't change to preprocessor concatenation (u ## STR) because that
fails when QStringLiteral is used with a macro instead of an actual
string literal.

Task-number: QTBUG-65479
Change-Id: I39332e0a867442d58082fffd1504a0a868c291ef
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

0 files changed, 0 insertions, 0 deletions