[FIX] Fix beam search test

[zhuohan123]

Revert a change in #2869 that causes beam search test to fail.

[WoosukKwon]

LGTM. Thanks for the fix.

[ronensc]

Please note that the proposed change currently only reads the first line (i.e., the first prompt) of the file and ignores the others.

AFAIU, the beam search test fails on the second prompt. I believe the fix should be applied to the beam search test. A temporary solution would be to pass only the first prompt to the beam search test. This way, all other tests relying on _read_prompts() would benefit from testing with multiple prompts.

[zhuohan123]

Please note that the proposed change currently only reads the first line (i.e., the first prompt) of the file and ignores the others.

AFAIU, the beam search test fails on the second prompt. I believe the fix should be applied to the beam search test. A temporary solution would be to pass only the first prompt to the beam search test. This way, all other tests relying on _read_prompts() would benefit from testing with multiple prompts.

Thanks for pointing this out! Changed this PR accordingly.

[WoosukKwon]

@zhuohan123 Let's merge it?