docs: find_program can return the current Python3 interpreter
This was the case since i.e.
version 0.50.0. Fixes
@@ -24,7 +24,9 @@ description: |
(because the command invocator will reject the command otherwise) and
Unixes (if the script file does not have the executable bit set).
Hence, you *must not* manually add the interpreter while using this
- script as part of a list of commands.
+ script as part of a list of commands. Since *0.50.0* if the "python3"
+ program is requested and it is not found in the system, Meson will return
+ its current interpreter.
If you need to check for a program in a non-standard location, you can
just pass an absolute path to `find_program`, e.g.
