Stage 3 of the faithful libyaml scanner port, continued. Translates fetch_block_scalar, scan_block_scalar, and scan_block_scalar_breaks: literal (|) and folded (>) block scalars with the chomping (+/-) and indentation indicators in either order, indentation auto-detection from the first non-empty line (clamped to parser indent + 1), folded joining of equally-indented non-empty lines into a space, and clip/strip/keep chomping of the trailing breaks. Unit-tested for literal clip, folded join, and strip chomping. Only tags and directives remain unported in the scanner. 314 tests, no regression.
Mihaela Mihaljevic
7918eefe14