Limit RTL hack to classic engines (#12919)

It breaks with LuaTeX, is definitely not needed with XeTeX, and it is
doubted whether it is needed at all (but this needs further testing).

diff --git a/src/BufferParams.cpp b/src/BufferParams.cpp
index 8a8422a7ff206441b5cf5c5309468695f4681964..36ebb21e99cc95db360546f5880eb216153509c3 100644 (file)
--- a/src/BufferParams.cpp
+++ b/src/BufferParams.cpp
@@ -1593,7 +1593,8 @@ void BufferParams::validate(LaTeXFeatures & features) const
 {
        features.require(documentClass().required());
 
-       if (columns > 1 && language->rightToLeft())
+       if (columns > 1 && language->rightToLeft()
+           && !features.runparams().isFullUnicode())
                features.require("rtloutputdblcol");
 
        if (output_changes) {