Fix a number of minor local bugs #8608
Merged
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Hi, I was browsing matplotlib on www.lgtm.com, and noticed a number of alerts (https://lgtm.com/projects/g/matplotlib/matplotlib/alerts/). Some of them were fairly clear-cut, and I saw that I could fix them immediately, hence this PR. Others would require someone with more knowledge of the code to triage.
You can also turn on PR integration to help avoiding introducing more of these kinds of errors: https://lgtm.com/projects/g/matplotlib/matplotlib/ci/
By the way, matplotlib has been incredibly useful in my work, love the project! I hope this can help a little.