Task: Interpret a bare quoted-printable soft break

TASK-DESCRIPTION

Create: dataflow.in/vcard/soft-break.vcf
Modify: sources/vcard/vcard_reader.cpp
Modify: sources/tools/vcard_inspect.cpp
Modify: tests/vcard_reader_test.cpp
Modify: tests/60-command-line-tools.sh
Modify: prompts/features/03-vcard-reader.md
Modify: documents/10-vcard-format.md
Modify: documents/12-vcard-knowns-and-unknowns.md
Modify: prompts/tasks/00-tasks.md
Modify: TODO.md

A real 2.1 card writes a quoted-printable soft break with no leading whitespace on the continuation line: ADR;...;ENCODING=QUOTED-PRINTABLE:...=0D=0A= followed by a line at column 0. The reader currently treats the continuation as a malformed property, so the address is truncated, the LABEL is dropped, and two warnings are raised.

The reader must join the next physical line when a quoted-printable property’s line ends with =, whether or not that line begins with whitespace. A non-quoted-printable line keeps a trailing = as text. A five-component ADR whose fifth part looks like a postal code is read as a postal code, so the short form ;;street;city;00000 displays without an extra comma. vcard-inspect reports the LABEL beside the address.

The fixture is synthetic: every value in it is invented, because a real card belongs to a person and the repository is public.

TASK-OUTPUT

Produce these complete files in this order, then the VERIFICATION: line: 1. dataflow.in/vcard/soft-break.vcf 2. sources/vcard/vcard_reader.cpp 3. sources/tools/vcard_inspect.cpp 4. tests/vcard_reader_test.cpp 5. tests/60-command-line-tools.sh 6. prompts/features/03-vcard-reader.md 7. documents/10-vcard-format.md 8. documents/12-vcard-knowns-and-unknowns.md 9. prompts/tasks/00-tasks.md 10. TODO.md

TASK-CONTEXT

The format research is in documents/10-vcard-format.md; the decisions and their reasons are in documents/12-vcard-knowns-and-unknowns.md. The supplied card that exposed the defect is not committed: the fixture mirrors its line structure with invented values.

Do not commit the supplied card, any value from it, or a fixture derived from its personal data.

TASK-FILES

Operation	Path
create	`dataflow.in/vcard/soft-break.vcf`
modify	`sources/vcard/vcard_reader.cpp`
modify	`sources/tools/vcard_inspect.cpp`
modify	`tests/vcard_reader_test.cpp`
modify	`tests/60-command-line-tools.sh`
modify	`prompts/features/03-vcard-reader.md`
modify	`documents/10-vcard-format.md`
modify	`documents/12-vcard-knowns-and-unknowns.md`
modify	`prompts/tasks/00-tasks.md`
modify	`TODO.md`

TASK-VERIFY

Run: make test from the repository root.
Expected: exit status 0, with 15-vcard-reader and 60-command-line-tools reporting ok.
Run: vcard-inspect dataflow.in/vcard/soft-break.vcf.
Expected: the address and address label contain Exampleville, and no malformed line warning appears.

TASK-FEATURES

prompts/features/03-vcard-reader.md

TASK-ACCEPTANCE

VCARD-READER-R004
VCARD-READER-R014
VCARD-READER-R026
VCARD-READER-R027

OUTPUT: the complete files in the order listed, ending with the VERIFICATION: line.