Not mistakenly at all: There is a (definitely valid): "Edit is too minor" rejection reason:

This edit is too minor; suggested edits should be substantive improvements addressing multiple issues in the post.

There is a good reason for this. Allowing small edits would clog the edit queue. Moreover, you earn reputation and a badge for suggested edits, we expect people to put some effort into editing.

A spelling mistake is not going to prevent people from answering the question, so it's just a spelling mistake. Unless the editor improved the post significantly, such edits should definitely be rejected as too minor.

Not mistakenly at all: There is a (definitely valid): "Edit is too minor" rejection reason:

This edit is too minor; suggested edits should be substantive improvements addressing multiple issues in the post.

There is a good reason for this. Allowing small edits would clog the edit queue. Moreover, you earn reputation and a badge for suggested edits, we expect people to put some effort into editing.

A spelling mistake is not going to prevent people from answering the question, so it's just a spelling mistake. Unless the editor improved the post significantly, such edits should definitely be rejected as too minor.

Note that the most popular tag is added to the title if not already present. So, search engines would see "jquery - jQuary Mobile disables the jQuary menu". If the jquery tag was missing from that particular question, and a suggested edit were to add that tag in addition to fixing the misspelling, then that would already be a much better edit.