Ruby

I think this is intended.

Comment of MRI

and

rubyspec.

String#split started to accept nil as a separator in Ruby 1.5/1.6. And the bahavior has not been changed since Ruby 1.6.

Maybe this is a documentation bug of RuReMa.

Reported. https://github.com/rurema/doctree/issues/222

I think it is better to fix the document of String#split

--- a/string.c +++ b/string.c @@ -6701,7 +6701,7 @@ static const char isspacetable[256] = {   /* * call-seq: - * str.split(pattern=$;, [limit]) -> anArray + * str.split(pattern=nil, [limit]) -> anArray  * * Divides <i>str</i> into substrings based on a delimiter, returning an array * of these substrings. @@ -6716,8 +6716,8 @@ static const char isspacetable[256] = { * <i>str</i> is split into individual characters. If <i>pattern</i> contains * groups, the respective matches will be returned in the array as well. * - * If <i>pattern</i> is omitted, the value of <code>$;</code> is used. If - * <code>$;</code> is <code>nil</code> (which is the default), <i>str</i> is + * If <i>pattern</i> is <code>nil</code>, the value of <code>$;</code> is used. + * If <code>$;</code> is <code>nil</code> (which is the default), <i>str</i> is  * split on whitespace as if ` ' were specified. * * If the <i>limit</i> parameter is omitted, trailing null fields are 

should I create another issue to discuss about the documentation change?
If no need I will commit it.