                 Changes in version 0.1.1 (2026-09-02)                  

Bug fixes

  - Fixed an error in the non-linear isotherm fitters (nonlinear_bet(),
    nonlinear_langmuir(), nonlinear_freundlich(), nonlinear_temkin())
    where computing the model summary could fail on singular-gradient
    fits. summary.nls() calls chol2inv(), which errors on some
    BLAS/LAPACK and CPU configurations (notably BLIS and arm64 Linux)
    when the gradient is singular, causing the examples and vignette to
    halt. The summary is now computed defensively: if it cannot be
    formed, the function returns NULL for the model summary (with a
    warning) instead of stopping. This resolves the CRAN "Additional
    issues" failures on BLIS and linux-arm64.
