[chore][pkg/stanza] Simplify tokenize package #26040
Merged
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This PR contains several simplifications within and relating to the new tokenization package:
tokenize.Multiline
now returns abufio.splitFunc
without concern for a flush func. A flush func is applied later if necessary.tokenize.Splitter
.SplitterConfig
can now generate abufio.SplitFunc
directly.tokenize.Flusher
.FlusherConfig
can now wrap abufio.SplitFunc
directly. (It does still create a struct to maintain state, but then wraps the split func with a receiver that interacts with this state.)fileconsumer
's internalsplitter
package was also simplified. It may make sense to merge this intotokenize
in a future PR, but this PR is large enough.