Over the last month or so I have been playing with creating Discord bots for Dungeons and Dragons using Javascript. For this I have been reviewing ...
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If it fixes something, even if minor, of course I'd welcome it. I'm guessing the one case you mentioned where your PR hasn't been merged or otherwise responded to is probably as you guessed, not actively maintained. However, it could also be for the opposite reason. If it is a very active project then a minor doc edit PR would likely be lower priority than other PRs. I think you'd easily see if that is the case though.