Remove config names as yaml keys (#4367)

* validate YAML part

* fix bad YAML keys

* don't have config names as yaml keys

* style

* Remove hacking license tags when mirroring datasets on the Hub

* fix test

* fix style

* more fixes

* remove dots in QA column mapping keys

Commit from https://github.com/huggingface/datasets/commit/3f3013441e4af9bf4efa752b5e6e184a588b7a80

README.md

@@ -7,24 +7,22 @@ language_creators:
 languages:
 - en
 licenses:
-- cc-by-nc-4-0
+- cc-by-nc-4.0
 multilinguality:
 - monolingual
 size_categories:
-  evaluation_dataset:
-  - n<1K
-  search_corpus:
-  - 1M<n<10M
+- 1M<n<10M
+- n<1K
 source_datasets:
 - original
 task_categories:
 - question-answering
 task_ids:
-  evaluation_dataset:
-  - extractive-qa
-  search_corpus:
-  - extractive-qa
+- extractive-qa
 paperswithcode_id: neural-code-search-evaluation-dataset
+configs:
+- evaluation_dataset
+- search_corpus
 ---
 
 # Dataset Card for Neural Code Search