fixed closing bracket typo

[brmanuel]

Fixed the below typo.
Note that without the fix, all objective parameters with value < 1e-20 are discarded.
With the fix, all objective parameters with absolute value < 1e-20 are discarded.

[CLAassistant]

All committers have signed the CLA.

[sebheger]

Thanks for your contribution @brmanuel

• Could please give commit a more speaking name like "Fixed closing bracket typo at objective values (gurobi)"?
• Please a test case, where you have certain small and negative objective values. You can query the resulting linExpr for assertion