render_toml_command() emitted the body inside a multiline *basic* TOML
string ("""..."""), which processes backslash escape sequences. A command
body containing a backslash — e.g. a Windows path like C:\Users\... whose
\U reads as an invalid unicode escape — therefore produced unparseable TOML
("Invalid hex value"), so the generated Gemini/Tabnine command file failed
to load. A body ending in a backslash also silently ate the closing newline
via TOML line-continuation.
Route bodies containing a backslash to the multiline *literal* form
('''...'''), which does not process escapes, or to the escaped basic string
when both triple-quote styles are present. Mirrors the escaping already done
by base.py's TomlIntegration.
Add tests covering a Windows path, a trailing backslash, and the
backslash + both-triple-quote-styles fallback.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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