[GRASS-git] [OSGeo/grass] fb083e: v.clean threshold description: clarify map units (...

[Markus Neteler]

  Branch: refs/heads/main
  Home:   https://github.com/OSGeo/grass
  Commit: fb083e16556107752d163ecdbe8fd2a8d1e22f86
      https://github.com/OSGeo/grass/commit/fb083e16556107752d163ecdbe8fd2a8d1e22f86
  Author: Markus Neteler <neteler at osgeo.org>
  Date:   2023-11-20 (Mon, 20 Nov 2023)

  Changed paths:
    M vector/v.clean/main.c

  Log Message:
  -----------
  v.clean threshold description: clarify map units (#2950)

* v.clean threshold description: clarify map units

This PR de-confuses the current description of `threshold` from the misleading

```
  threshold   Threshold in map units, one value for each tool
```

to

```
  threshold   One value for each tool; for threshold units, see each tool
```

The point is that users need to look it up in the manual page.
Esp. in long-lat locations, map units for area based tools are to be given in sqm.