Case-insensitive and whitespace handling for context_precision.

[Pauldevillers]

Hello,

Title: Case-insensitive and whitespace handling for response evaluation

Description : This PR modifies the response evaluation in the context_precision.py script. The changes include:

• Making the response evaluation case-insensitive: The code now converts each response to lowercase before checking if "yes" is in the response. This ensures that the evaluation is not affected by the case of the response.
• Handling whitespace in responses: The code now strips leading/trailing whitespace from each response before checking if "yes" is in the response. This ensures that the evaluation is not affected by whitespace in the response.

[Pauldevillers]

Seems there is an issue with the 'llama_index.node_parser.simple' package.

[shahules786]

Hey @Pauldevillers , No worries. There #291 that will fix the issue.

[Pauldevillers]

Nice @shahules786 , can we retriger the checks ?

[shahules786]

closing in respect to #289 merged