[PATCH v3][BZ #17787] Fix exponents in manual.

[Joseph Myers]

On Thu, 18 Jun 2015, Ondřej Bílka wrote:

> diff --git a/manual/filesys.texi b/manual/filesys.texi
> index 0f2e3dc..181de76 100644
> --- a/manual/filesys.texi
> +++ b/manual/filesys.texi
> @@ -2,6 +2,18 @@
>  @c %MENU% Functions for manipulating files
>  @chapter File System Interface
>  
> +@iftex
> +@macro twoexp{exp}
> +@math{2^{{\exp\}}}
> +@end macro
> +@end iftex
> +@ifnottex
> +@macro twoexp{exp}
> +2^\exp\
> +@end macro
> +@end ifnottex

The macro definitions should go in macros.texi, rather than being 
duplicated in each file using it.

-- 
Joseph S. Myers
joseph@codesourcery.com