the target
				buffer "<afile>", "<abuf>". |<buffer=abuf>|
							*BufDelete*
BufDelete			Before deleting a buffer from the buffer list.
				The BufUnload may be called first (if the
				buffer was loaded).
				Also used just before a buffer in the buffer
				list is renamed.
				NOTE: Current buffer "%" is not the target
				buffer "<afile>", "<abuf>". |<buffer=abuf>|
				Do not change to another buffer.
							*BufEnter*
BufEnter			After entering (visiting, switching-to) a new
				or existing buffer. Useful for setting
				filetype options.  Compare |BufNew| which
				does not trigger for existing buffers.
				After |BufAdd|.
				After |BufReadPost|.
							*BufFilePost*
BufFilePost			After changing the name of the current buffer
				with the ":file" or ":saveas" command.
							*BufFilePre*
BufFilePre			Before changing the name of the current buffer
				with the ":file" or ":saveas" command.
							*BufHidden*
BufHidden			Before a buffer becomes hidden: when there are
				no longer windows that show the buffer, but
				the buffer is not unloaded or deleted.

				Not used for ":qa" or ":q" when exiting Vim.
				NOTE: Current buffer "%" is not the target
				buffer "<afile>", "<abuf>". |<buffer=abuf>|
							*BufLeave*
BufLeave			Before leaving to another buffer.  Also when
				leaving or closing the current window and the
				new current window is not for the same buffer.

				Not used for ":qa" or ":q" when exiting Vim.
							*BufModifiedSet*
BufModifiedSet			After the `'modified'` value of a buffer has
				been changed.
							*BufNew*
BufNew				After creating a new buffer (except during
				startup, see |VimEnter|) or renaming an
				existing buffer. Unlike |BufEnter|, visiting
				(switching to) an existing buffer will not
				trigger this again.
				NOTE: Current buffer "%" is not the target
				buffer "<afile>", "<abuf>". |<buffer=abuf>|
				See also |BufAdd|, |BufNewFile|.
							*BufNewFile*
BufNewFile			When starting to edit a file that doesn't
				exist.  Can be used to read in a skeleton
				file.
						*BufRead* *BufReadPost*
BufRead or BufReadPost		When starting to edit a new buffer, after
				reading the file into the buffer, before
				processing modelines.  See |BufWinEnter| to do
				something after processing modelines.
				Also triggered:
				- when writing an unnamed buffer in a way that
				  the buffer gets a name
				- after successfully recovering a file
				- for the "filetypedetect" group when
				  executing ":filetype detect"
				Not triggered:
				- for the `:read file` command
				- when the file doesn't exist
							*BufReadCmd*
BufReadCmd			Before starting to edit a new buffer.  Should
				read the file into the buffer. |Cmd-event|
						*BufReadPre* *E200* *E201*
BufReadPre			When starting to edit a new buffer, before
				reading the file into the buffer.  Not used
				if the file doesn't exist.
							*BufUnload*
BufUnload			Before unloading a buffer, when the text in
				the buffer is going to be freed.
				After BufWritePost.
				Before BufDelete.
				Triggers for all loaded buffers when Vim is
				going to exit.
				NOTE: Current buffer "%" is not the target
				buffer "<afile>", "<abuf>". |<buffer=abuf>|
				Do not switch buffers or windows!
				Not triggered when exiting and v:dying is 2 or
				more.
							*BufWinEnter*
BufWinEnter			After a buffer is displayed in a window.  This
				may be when the buffer is loaded (after
				processing modelines) or when a hidden buffer
				is displayed (and is no longer hidden).

				Not triggered for |:split| without arguments,
				since the buffer does not change, or :split
				with a file already open in a window.
				Triggered for ":split" with the name of the
				current buffer, since it reloads that buffer.
							*BufWinLeave*
BufWinLeave			Before a buffer is removed from a window.
				Not when it's still visible in another window.
				Also triggered when exiting.
				Before BufUnload, BufHidden.
				NOTE: Current buffer "%" is not the target