docs(cli): document $$ escape in --help for replace_with#342
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Issue chmln#341: $$ syntax is documented in README but missing from --help output. The replace_with arg help only mentioned $1, $2 capture groups but didn't document how to escape a literal $, which is a common need. Added one line to the doc comment noting that $$ produces a literal $.
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Summary
Issue #341: The
690081escape syntax is documented in the README but missing from--helpoutput.The
replace_witharg help only mentioned,capture groups but didn't document how to escape a literal$, which is a common need. Added one line to the doc comment noting that690081produces a literal$.Test plan
cargo run --bin sd -- --helpnow shows the690081escape note under the replace_with argument.Related