bug#26925: Improve /doc/lispref/strings.texi (split-string) documentation

[Eli Zaretskii]

> From: Jean-Christophe Helary <jean.christophe.helary@gmail.com>
> Date: Mon, 15 May 2017 00:45:34 +0900
> 
> I slightly changed the paragraph order in the documentation to (split-string) 
> to make it more readable.
> 
> Jean-Christophe 
> 
> ===========================
> Improve documentation of (split-string)
> 
> * /doc/lispref/strings.texi (split-string): change paragraph
>   order to improve readability.
> ===========================

Thanks, pushed.

One nit: please don't refer to functions with syntax that looks like a
function call, as in (split-string) above, or foo() for C sources.
The GNU Coding Standards frown on such references, because they look
like a call to a function with no arguments, which is not what is
meant there.  We use 'split-string' and 'foo' instead, i.e. the name
of the function in quotes.