In the ProPgConstantExpressions page for example, the affected elements are already between 2 double quotes on each side:

Only the following operators/functions with constant arguments can be used to constitute constant expressions:

##""Bit"", ""BitReset"", ""BitSet"", ""HiByte"", ""HiWord"", ""LoByte"", ""LoWord""

""+"", ""-"", ""*"", ""/"", ""\"", ""^"", ""Mod"", ""Shl"", ""Shr""

""="", ""<>"", ""<="", "">="", ""<"", "">""

""And"", ""Eqv"", ""Imp"", ""Or"", ""Not"", ""Xor""

""Abs"", ""Acos"", ""Asin"", ""Atan2"", ""Atn"", ""Cos"", ""Exp"", ""Fix"", ""Frac"", ""Int"", ""Log"", ""Sgn"", ""Sin"", ""Sqr"", ""Tan""

""Asc"", ""Chr"", ""CVD"", ""CVI"", ""CVL"", ""CVLongInt"", ""CVS"", ""CVShort"", ""Len"", ""SizeOf""

""Cast"", ""CBool"", ""CByte"", ""CDbl"", ""CInt"", ""CLng"", ""CLngInt"", ""CShort"", ""CSign"", ""CSng"", ""CUByte"", ""CUInt"", ""CULng"", ""CULngInt"", ""CUnsg"", ""CUShort""

**more obviously all predefined symbols**##