Multiple argument shortcut in bash

Until recently I was using brace expansions in bash assuming that they were some semi-intelligent way of specifying multiple files and directories. For example:

rm ./{,testing.js,}

But they’re actually just a concise way of specifying lists of strings, so I’ve started using them a lot more often for things like the following, where previously I would have been typing out two very similar arguments:

mv ./misspe{z,l}t.txt
cp ./logs{,-2017-05-01}.txt
mv some_dir/{subdir/,}should_be_in_somedir.txt
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