Match any character once
	[abc]		Match the character a, b or c
	.		Matches a dot
	a{b,c}		Matches "ab" and "ac"

When the pattern includes a slash (/) Vim will compare directory names.
Without the slash only the last part of a file name is used.  For example,
"*.txt" matches "/home/biep/readme.txt".  The pattern "/home/biep/*" would
also match it.  But "home/foo/*.txt" wouldn't.
   When including a slash, Vim matches the pattern against both the full path
of the file ("/home/biep/readme.txt") and the relative path (e.g.,
"biep/readme.txt").

	Note:
	When working on a system that uses a backslash as file separator, such
	as MS-Windows, you still use forward slashes in autocommands.  This
	makes it easier to write the pattern, since a backslash has a special
	meaning.  It also makes the autocommands portable.


DELETING

To delete an autocommand, use the same command as what it was defined with,
but leave out the {command} at the end and use a !.  Example: >

	:autocmd! FileWritePre *

This will delete all autocommands for the "FileWritePre" event that use the
"*" pattern.


LISTING

To list all the currently defined autocommands, use this: >

	:autocmd

The list can be very long, especially when filetype detection is used.  To
list only part of the commands, specify the group, event and/or pattern.  For
example, to list all BufNewFile autocommands: >

	:autocmd BufNewFile

To list all autocommands for the pattern "*.c": >

	:autocmd * *.c

Using "*" for the event will list all the events.  To list all autocommands
for the cprograms group: >

	:autocmd cprograms


GROUPS

The {group} item, used when defining an autocommand, groups related autocommands
together.  This can be used to delete all the autocommands in a certain group,
for example.
   When defining several autocommands for a certain group, use the ":augroup"
command.  For example, let's define autocommands for C programs: >

	:augroup cprograms
	:  autocmd BufReadPost *.c,*.h :set sw=4 sts=4
	:  autocmd BufReadPost *.cpp   :set sw=3 sts=3
	:augroup END

This will do the same as: >

	:autocmd cprograms BufReadPost *.c,*.h :set sw=4 sts=4
	:autocmd cprograms BufReadPost *.cpp   :set sw=3 sts=3

To delete all autocommands in the "cprograms" group: >

	:autocmd! cprograms


NESTING

Generally, commands executed as the result of an autocommand event will not
trigger any new events.  If you read a file in response to a FileChangedShell
event, it will not trigger the autocommands that would set the syntax, for
example.  To make the events triggered, add the "++nested" flag: >

	:autocmd FileChangedShell * ++nested  edit


EXECUTING AUTOCOMMANDS

It is possible to trigger an autocommand by pretending an event has occurred.
This is useful to have one autocommand