Documentation for os.exec* functions omits information about required argument

Documentation

All of the os.exec* functions (there are 8) require the path to the executable to be the first argument given to the executable, as well as specified in the path or file parameter of the exec method. The documentation of the exec* functions doesn't include any information about this requirement, however it can be found at the start of the Process management section of the documentation. I think it should be moved to the exec* function documentation.

Additionally I personally think that the discussion of the different variants of the function is a bit confusing and would be easier to understand if it was structured differently and a few headings were added.

I have some ideas about how to do this and intend to put together a pull request addressing the issues.

Linked PRs

• gh-125565

從連結的 library/os.html#os.execl 部分中的 os.exec* 文件開始，並將其與 Process management 部分進行比較。開始之前先查看連結的 PR gh-125565；當必要的可執行檔路徑引數已隨函式記錄，且對變體的討論更加清楚時，這項工作就完成了。