Do not put spaces after monadic operators whose representation is not a bold word.
However, if the monadic operator is represented by a bold word, always put a space between the operator and the operand, even when the operand starts with a parenthesis.
Always put spaces before and after dyadic operators if the formula is not parenthesized. Spaces are optional if the formula is parenthesized, provided the operator is not represented by a bold word. Note however that if long tags are involved extra spaces may be advisable even for parenthesized formulas.
Examples:
{ No space after non-bold monadic operators }
int i = -10;
{ Always a space after bold monadic operator }
int i = ABS (base + offset)
{ Spaces in dyadic opeator }
total := a + b;
index := cnt +:= 1;
total := (a + b);
index := (cnt +:= 1);
total := (a+b);
index := (cnt+:=1)