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The readable 'table' format emitted string cells verbatim, so an embedded newline split one logical record across multiple physical lines and other control characters rendered invisibly. Downstream line-based consumers then misparsed the output with no error. Render backslash, newline, carriage return and tab as the two-character literals \\, \n, \r and \t, and every other non-printable control byte (C0 controls plus DEL) as \uXXXX. CSV and NDJSON output are unchanged. Add unit coverage for the new table_escape() helper (named controls, unicode escapes, DEL boundary, UTF-8 passthrough, column alignment) and a CLI end-to-end test asserting exact table/csv/ndjson output for cells that embed control characters.
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The readable 'table' format emitted string cells verbatim, so an embedded newline split one logical record across multiple physical lines and other control characters rendered invisibly. Downstream line-based consumers then misparsed the output with no error.
Render backslash, newline, carriage return and tab as the two-character literals \, \n, \r and \t, and every other non-printable control byte (C0 controls plus DEL) as \uXXXX. CSV and NDJSON output are unchanged.
Add unit coverage for the new table_escape() helper (named controls, unicode escapes, DEL boundary, UTF-8 passthrough, column alignment) and a CLI end-to-end test asserting exact table/csv/ndjson output for cells that embed control characters.