Log Message:
tcllib: update to 1.20

New in Tcllib 1.20
==================
    Module     Package              Version       Comments
    ---------- -------------------- ------------- ----------
    clay       clay                 0.8.6
    fileutil   fileutil::paths      1             Replaces: doctools::paths
    lazyset    lazyset              1
    math       math::quasirandom    1.0
               math::trig           1.0
    practcl    practcl              0.16.3
    struct     struct::map          1             Replaces: doctools::config
    textutil   textutil::patch      0.1
               textutil::wcswidth   35.1

Deprecations in Tcllib 1.20
===========================
    Module             Package           Replacement
    ------------------ ----------------- ----------------
    doctools           doctools::paths   fileutil::paths
    doctools           doctools::config  struct::map
    pt                 paths             fileutil::paths
    pt                 configuration     struct::map