[Rd] bug in strsplit(x, "") (PR#793)

[Kurt Hornik]

>>>>> ligges  writes:

> Instead of 
>   strsplit(c("Hello", "", "World"), NULL)

> (which works as expected), I used

>   strsplit(c("Hello", "", "World"), "")

> [[1]]
> [1] "H" "e" "l" "l" "o"

> [[2]]
> [1] ""  "e" "l" "l" "o"

> [[3]]
> [1] "W" "o" "r" "l" "d"


> The second element does not look like an expected result.

Thanks.  Fixed now.

-k
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