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The title is important, fixing any error in the title is a good enough reason to edit a question, even if it is older. Fixing a typo or bad grammar in the title is never too minor of an edit, unless you ignore obvious problems in the post body.
But that doesn't mean one should stop editing at the title, you should always try to fix all problems that a post ...
12
It's worth noting that the minor/major edit distinction is only relevant to making suggested edits before you have full edit privileges. We don't have any policy about what is too minor for full editors, since they are assumed to have developed the discretion to judge whether a post benefits from an edit or not, regardless of the number of letters it changes....
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When concerned with issues such as this, you can determine the best course of action by considering what another person in your situation would type into Google when looking for an answer to their problem.
In your particular case, changing the question title would be beneficial to future visitors. You should leave the content of the question the same, ...
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