Unparser omitts required parentheses

[Peter Aronsson]

Consider the following simple model:

model x
equation
  0 = (a - b) - (c - d);
end x;

Enter it in OMEdit, switch to diagram layer and then back to text view. The parentheses have disappeared! Giving this a blocker because if you happen to save a complete package you might get very confusing results!

Other example:

a/(b/c)

[Per Östlund]

Fixed in r19422.