rename, rename.ul (perl one) and mv are essentially different tools of the util-linux package (one of them isn't part of it), that though can do similar tasks (mv can rename files, the same as rename), they are highly specialized tools.
Please, change this back, there are 169 instances of rename (the tool) used that were renamed to mv which the rename tag won't be useful.
I imagine rename was meant to refer to the action of renaming, not the actual tool, but there's no tag wiki to be sure. I don't know where you came up with 169, but the synonym only took effect 40 times, so the rest of the time people have been choosing rename to describe their problem. I dropped the synonym for now in case there's actually a need to distinguish usages of mv from just generic "renaming files"
