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f17276e0c4
The reader's three-pass pipeline (backslash-join -> fold "+"-continuations onto raw lines -> split each folded line on ": ") broke on fields written as bare "Name:" (colon, no trailing space, no value) whose value is supplied entirely by following "+" lines -- the idiomatic recutils pattern for e.g. a "%doc:" field. Folding the continuation onto the raw line destroyed the ": " substring needed for the later split, so parsing such a field crashed with a "missing field separator" error, even on well-formed input. Found by testing against GNU recutils' own tutorial example (books.rec, from the manual's "A Little Example" page), now added as a fixture. Restructured parsing to split each line into a key/value field before folding continuations, so folding happens on the value rather than the raw line; when the preceding value is empty, the continuation becomes the value outright instead of gaining a spurious leading newline. Adds regression coverage (test/cases/io-recutils/0006, 0007) and a docs section covering the empty-value + continuation pattern. Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>
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mlr --skip-comments --irecutils --ojson cat test/input/books.rec
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