MathML: remove extraneous <mrow> in fractions

Contributed by lynx: https://www.lyx.org/trac/ticket/12629

diff --git a/src/mathed/InsetMathFrac.cpp b/src/mathed/InsetMathFrac.cpp
index 2431f68bb5416fa64558b74a82dee1ba7c94fe62..4ce758e8a469c45600415c99f7ea3bbf9df53aa8 100644 (file)
--- a/src/mathed/InsetMathFrac.cpp
+++ b/src/mathed/InsetMathFrac.cpp
@@ -506,8 +506,8 @@ void InsetMathFrac::mathmlize(MathMLStream & ms) const
        switch (kind_) {
        case ATOP:
                ms << MTag("mfrac", "linethickness='0'")
-                  << MTag("mrow") << cell(0) << ETag("mrow")
-                  << MTag("mrow") << cell(1) << ETag("mrow")
+                  << cell(0)
+                  << cell(1)
                   << ETag("mfrac");
                break;