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CaliBrain
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WordPress texturizes punctuation on output only, so a post stored as "The Stranger's Wife" renders as "The Stranger’s Wife". ABB's search matches the stored value and ANDs its terms, so one typographic character in the query empties the entire result set rather than merely ranking worse. Book metadata and mobile keyboards both hand us those characters. Map curly quotes, dashes and ellipses to ASCII before a query goes out, and on both sides of the relevance comparison, since scraped titles carry the rendered forms. Release titles are still stored and displayed exactly as ABB renders them; only matching normalizes. Also percent-encode the search query properly. The hand-rolled encoder only escaped double quotes and spaces, so a bare "&" started a new query parameter and silently truncated the search: "detective dan riley books 1 & 2 weatherley" reached ABB as "detective dan riley books 1" and returned six confident-looking results without the requested book among them. "%" and "+" were mangled too.