new delimiter syntax in mixfixes: \{SYMBOLNAME} is char from symbol font;
new delimiter syntax in mixfixes: \{SYMBOLNAME} is char from symbol font;

MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle