[GRASS-git] [OSGeo/grass-addons] 179e05: r.learn.train: use formatted string (#869)

[Markus Metz]

  Branch: refs/heads/grass8
  Home:   https://github.com/OSGeo/grass-addons
  Commit: 179e05f89cae6f9ec440e48030b02b89b34fda38
      https://github.com/OSGeo/grass-addons/commit/179e05f89cae6f9ec440e48030b02b89b34fda38
  Author: Markus Metz <33666869+metzm at users.noreply.github.com>
  Date:   2023-02-24 (Fri, 24 Feb 2023)

  Changed paths:
    M src/raster/r.learn.ml2/r.learn.predict/r.learn.predict.py
    M src/raster/r.learn.ml2/r.learn.train/r.learn.train.py

  Log Message:
  -----------
  r.learn.train: use formatted string (#869)

* r.learn.train: use formatted string
* add messages what's happening
* minor msg style fix

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Co-authored-by: Markus Neteler <neteler at gmail.com>