Function xmlEscape
Returns a copy of the input string, after escaping all XML reserved characters.
If the string does not contain any reserved character, it is returned unmodified; otherwise, a copy is made using the specified allocator.
Prototypes
T[] xmlEscape(T, Alloc)(
T[] str
);
T[] xmlEscape(T, Alloc)(
T[] str,
ref Alloc alloc
);