[3.12] gh-121101: Document -Wall option (an alias for -Walways) (GH-121102) (#121147)

gh-121101: Document -Wall option (an alias for -Walways) (GH-121102)
(cherry picked from commit 0a1e8ff)

Co-authored-by: Wim Jeantine-Glenn <[email protected]>

Author: miss-islington

Doc/using/cmdline.rst

@@ -440,6 +440,7 @@ Miscellaneous options
        -Wdefault  # Warn once per call location
        -Werror    # Convert to exceptions
        -Walways   # Warn every time
+       -Wall      # Same as -Walways
        -Wmodule   # Warn once per calling module
        -Wonce     # Warn once per Python process
        -Wignore   # Never warn
@@ -842,6 +843,7 @@ conflict.
        PYTHONWARNINGS=default  # Warn once per call location
        PYTHONWARNINGS=error    # Convert to exceptions
        PYTHONWARNINGS=always   # Warn every time
+       PYTHONWARNINGS=all      # Same as PYTHONWARNINGS=always
        PYTHONWARNINGS=module   # Warn once per calling module
        PYTHONWARNINGS=once     # Warn once per Python process
        PYTHONWARNINGS=ignore   # Never warn

Misc/python.man

@@ -251,6 +251,7 @@ emitted by a process (even those that are otherwise ignored by default):
   -Wdefault  # Warn once per call location
   -Werror    # Convert to exceptions
   -Walways   # Warn every time
+  -Wall      # Same as -Walways
   -Wmodule   # Warn once per calling module
   -Wonce     # Warn once per Python process
   -Wignore   # Never warn