skipSeparation consumed only spaces between tokens, so a tab after an
indicator leaked into the following node: an explicit key written `?\tkey`
became the key `\tkey` rather than `key`. A tab is separation white space in
YAML, forbidden only as indentation, which the line-start scan already handles
before this point.
Skip tabs there too. This closes the post-indicator tab leak left open when
the indicator boundary itself was changed, and handles a run of tabs between a
`:` and its value. The test-suite rates are unchanged, since no comparable
case isolates this, but the parser now matches the spec on tab separation.
435 tests pass.
Mihaela M
67d72c8b15