fsspec/implementations/local: correctly report seekable #743
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The current implementation of the local filesystem throws an error when you try to seek on a local file opened in text mode. This is because
io.TextIOWrapperchecks seekable() before calling seek/tell even though it is supported.This adds the
.seekable()method so seeking can be used in text mode where supported.This also adds a local and in-memory FS test just for good measure.