Improved description of add_items

[TakaakiFuruse]

This is just a suggestion of doc improvement.

I have made description of labels and data_labels together since...

1. There's no argument called labels for add_items func.
2. It felt like labels were a typo of data_labels from a previous commit.

[yurymalkov]

Hi @TakaakiFuruse
Thank you for the PR!
It seems both names are wrong, and the correct name should be ids...(https://github.com/nmslib/hnswlib/blob/master/python_bindings/bindings.cpp#L664). It seems there are also some other names that are wrong.
I would appreciate if you fix it and update the PR.

[TakaakiFuruse]

@yurymalkov

I am happy to fix my PR.

It seems there are also some other names that are wrong.

So for example,

add_items(data, data_labels, num_threads = -1)

should be

add_items(data, ids, num_threads = -1)

??

[yurymalkov]

Yes, that would be nice!
Other stuff is also wrong. E.g. mark_deleted should have label instead of data_label .
init_index has wrong parameter order (M should come before ef_construction ).

[TakaakiFuruse]

@yurymalkov
FIXED!!

[yurymalkov]

@TakaakiFuruse thank you so much!