Studio's QA Checker offers a section under Punctuation to check for unintentional spaces before punctuation marks, a very useful feature to spot those extra spaces that might be difficult to see, especially in the vicinity of tags.
I find that a simple enhancement that makes this feature more useful for me is adding a closing parenthesis and a comma to the selection of marks, which already includes a colon, an exclamation point, a question mark and a semicolon.
To apply this change to all projects created in the future and to future documents processed with the single document translation workflow, go to File - Options - Verification - QA Checker 3.0 - Punctuation and add the necessary punctuation marks as shown below:
Please note that making this change at the global level will not affect any existing projects or open documents.
To apply the change to current projects in your system created before the change or to packages received from a client, go to Project Settings - Verification - QA Checker 3.0 - Punctuation and do the same.
Once this has been set, Studio will show a warning* when unintentional spaces are found in a target segment, as shown here:
*Provided that the QA Checker 3.0 checkbox (under Verification) and the Check for intentional spaces before: checkbox (under Punctuation) are checked.
And that's it, a simple customization that can make Studio a little more helpful!