&includexpr = expand('<SID>') .. 'My_includeexpr()'

Otherwise, using "<SID>" outside of a script context is an error.

If you need to get the script number to use in a complicated script, you can
use this function: >
	func s:ScriptNumber()
	  return matchstr(expand('<SID>'), '<SNR>\zs\d\+\ze_')
	endfunc

The "<SNR>" will be shown when listing functions and mappings.  This is useful
to find out what they are defined to.

The |:scriptnames| command can be used to see which scripts have been sourced
and what their <SNR> number is.

==============================================================================
4. User-defined commands				*user-commands*

It is possible to define your own Ex commands.  A user-defined command can act
just like a built-in command (it can have a range or arguments, arguments can
be completed as filenames or buffer names, etc), except that when the command
is executed, it is transformed into a normal Ex command and then executed.

For starters: See section |40.2| in the user manual.

					*E183* *E841* *user-cmd-ambiguous*
All user defined commands must start with an uppercase letter, to avoid
confusion with builtin commands.  Exceptions are these builtin commands:
	:Next
They cannot be used for a user defined command.

The other characters of the user command can be uppercase letters, lowercase
letters or digits.  When using digits, note that other commands that take a
numeric argument may become ambiguous.  For example, the command ":Cc2" could
be the user command ":Cc2" without an argument, or the command ":Cc" with
argument "2".  It is advised to put a space between the command name and the
argument to avoid these problems.

When using a user-defined command, the command can be abbreviated.  However, if
an abbreviation is not unique, an error will be issued.  Furthermore, a
built-in command will always take precedence.

Example: >
	:command Rename ...
	:command Renumber ...
	:Rena				" Means "Rename"
	:Renu				" Means "Renumber"
	:Ren				" Error - ambiguous
	:command Paste ...

It is recommended that full names for user-defined commands are used in
scripts.

:com[mand]						*:com* *:command*
			List all user-defined commands.  When listing commands,
			the characters in the first columns are:
			    !	Command has the -bang attribute
			    "	Command has the -register attribute
			    |   Command has the -bar attribute
			    b	Command is local to current buffer
			(see below for details on attributes)
			The list can be filtered on command name with
			|:filter|, e.g., to list all commands with "Pyth" in
			the name: >
				filter Pyth command

:com[mand] {cmd}	List the user-defined commands that start with {cmd}

							*:command-verbose*
When 'verbose' is non-zero, listing a command will also display where it was
last defined and any completion argument. Example: >

    :verbose command TOhtml
<	Name	    Args Range Complete  Definition ~
	TOhtml	    0	 %		 :call Convert2HTML(<line1>, <line2>) ~
	    Last set from /usr/share/vim/vim-7.0/plugin/tohtml.vim ~

See |:verbose-cmd| for more information.

							*E174* *E182*
:com[mand][!] [{attr}...] {cmd} {repl}
			Define a user command.  The name of the command is
			{cmd} and its replacement text is {repl}.  The
			command's attributes (see below) are {attr}.  If the
			command already exists, an error is reported, unless a
			! is specified, in which case the command is
			redefined.  There is one exception: When sourcing a
			script again, a command that was previously defined in
			that script will be silently replaced.


:delc[ommand] {cmd}				*:delc* *:delcommand* *E184*
			Delete the user-defined command {cmd}.

:delc[ommand] -buffer {cmd}					*E1237*
			Delete the user-defined command {cmd} that was defined
			for the current buffer.

:comc[lear]						*:comc* *:comclear*
			Delete all user-defined commands.


Command attributes ~
							*command-attributes*
User-defined commands are treated by Nvim just like any other Ex commands.  They
can have