Method setTextEqualAC

src/diff.h:519–519

    [[nodiscard]] bool isTextEqualAB() const { return bTextAEqB; }

    void setTextEqualAC(const bool equal) { bTextAEqC = equal; }
    void setTextEqualBC(const bool equal) { bTextBEqC = equal; }
    void setTextEqualAB(const bool equal) { bTextAEqB = equal; }