Patch from Jean Wolter expr currently always adds even if told to subtract
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| @@ -438,7 +438,7 @@ static VALUE *eval3 (void) | |
| if (nextarg ("+")) | |
| op = '+'; | |
| else if (nextarg ("-")) | |
| - | op = '+'; |
| + | op = '-'; |
| else | |
| return l; | |
| args++; | |