Bug Report: Inconsistency in Handling Deleted Articles in MEDLINE Parser

[callebalik]

Relates to #165

Description

There inconsistency between the documentation and the implementation of the parse_medline_xml function in the MEDLINE parser. The docstring claims that deleted articles are processed and returned with delete: True, but the actual implementation does not handle deleted articles at all.

Current Behavior

The function's docstring states:

"Articles that have been deleted will be added with no information other than the field delete being True."

However, the actual implementation:

• Only processes elements with the tag PubmedArticle.
• Never processes Delete information.
• Always sets delete: False in the returned article dictionaries via 'parse_article_info'.

Additionally, the parse_article_info documentation contradicts the parent function's claim by stating:

"The field delete is always False because this function parses articles that by definition are not deleted."

Expected Behavior

One of the following should occur:

1. The parser should handle DeleteCitation elements and return them with delete: True as documented.
2. The documentation should be corrected to reflect that deleted articles are not processed.

Steps to Reproduce

1. Examine the code in medline_parser.py.

[iacopy]

Thank you. My tests fail if I upgrade from version 0.3.1 to 0.5.1 (but also 0.4.0) precisely because deleted items are not handled. In the deletion tests I also get the articles that were supposed to be deleted.

[iacopy]

I opened PR #167 to resolve the issue.
Then a second one was opened for the same issue (#168).