Scorer's alpha parameter docs are confusing

[jindrahelcl]

Hi, I want to use the C++ code as a library and when I was looking at the tests, I noticed that simply plugging a scorer with default alpha parameter (which is zero) changes the output. According to a comment in the code, setting alpha to zero should ignore the language model. How come there are two different outcomes in the tests then? See here and here.

Thanks for clarifying this.