Use ./x instead of ./x.py in documentation · Issue #1707 · rust-lang/rustc-dev-guide (original) (raw)
./x is the most likely to work on every system (on Unix it runs the shell script that does python version detection, on Windows it will probably run the powershell script - certainly less likely to break than ./x.py which often just opens the file in an editor).
This can be done with a simple find and replace, so it's a great first issue.