Fix Early Stopped Trials in Goptuna Suggestion

[andreyvelich]

In Goptuna Suggestion we should transfer the EarlyStopped Trials to Pruned.
Is that correct @c-bata ?

Also, I added additional info in errors.

/assign @c-bata @gaocegege @johnugeorge

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[gaocegege]

/lgtm

[c-bata]

In Goptuna Suggestion we should transfer the EarlyStopped Trials to Pruned.
Is that correct @c-bata ?

Correct 👍 Thanks!

---

This is just a nit-picking comment but it is recommended to not capitalize the error string by Golang wiki.

Error strings should not be capitalized (unless beginning with proper nouns or acronyms) or end with punctuation, since they are usually printed following other context.
https://github.com/golang/go/wiki/CodeReviewComments#error-strings

[andreyvelich]

This is just a nit-picking comment but it is recommended to not capitalize the error string by Golang wiki.

Error strings should not be capitalized (unless beginning with proper nouns or acronyms) or end with punctuation, since they are usually printed following other context.
https://github.com/golang/go/wiki/CodeReviewComments#error-strings

Got it, thank you for this info.
Sorry for these changes.