When I want to find the command bound to C-u M-. using C-h k, it turns out that emacs gives me the command bound with C-u. What should I do ?
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C-uis provides a prefix argument to the function called after it (as you can see from its docs). Access the documentation forM-.and then look there for what happens when the function receives a prefix argument. There’s no separate documentation forC-u M-.since it is not separate function.