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I see <cr>s a lot in vim mappings, but what does it do?
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The CR command collects failure information and either displays it on the console or dumps the information to a floppy disk.
Short for carriage return, CR is often used to represent a carriage return done by pressing the Enter and Return key.
In Vim (and Emacs) documentation, C- and M- stand for Ctrl and Meta (i.e. Alt ) respectively.
:help key-notation says:
notation meaning equivalent decimal value(s) ----------------------------------------------------------------------- <CR> carriage return CTRL-M 13 *carriage-return* <Return> same as <CR> *<Return>* <Enter> same as <CR> *<Enter>* Mappings often involve Ex commands and you must press <CR> to execute them so it's included in the mapping.
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