riched20: Add tests for ITextRange interface.

[Nikolay Sivov]

On 7/18/2013 20:28, Caibin Chen wrote:
> Add tests for start and end point, setting and getting text.
> ---
>   dlls/riched20/tests/Makefile.in |   3 +-
>   dlls/riched20/tests/txtrng.c    | 343 ++++++++++++++++++++++++++++++++++++++++
>   2 files changed, 345 insertions(+), 1 deletion(-)
>   create mode 100644 dlls/riched20/tests/txtrng.c
You could just use existing file, richole.c fits I think.