Update Python shebangs

Author: HexDecimal

build_libtcod.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python
 """Parse and compile libtcod and SDL sources for CFFI."""
 from __future__ import annotations
 

build_sdl.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python
 """Build script to parse SDL headers and generate CFFI bindings."""
 from __future__ import annotations
 

docs/tcod/getting-started.rst

@@ -21,7 +21,7 @@ integer increments.
 
 Example::
 
-    #!/usr/bin/env python3
+    #!/usr/bin/env python
     # Make sure 'dejavu10x10_gs_tc.png' is in the same directory as this script.
     import tcod.console
     import tcod.context
@@ -89,7 +89,7 @@ clearing the console every frame and replacing it only on resizing the window.
 
 Example::
 
-    #!/usr/bin/env python3
+    #!/usr/bin/env python
     import tcod.context
     import tcod.event
 

examples/audio_tone.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python
 """Shows how to use tcod.sdl.audio to play a custom-made audio stream.
 
 Opens an audio device using SDL and plays a square wave for 1 second.

examples/cavegen.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python
 """A basic cellular automata cave generation example using SciPy.
 
 http://www.roguebasin.com/index.php?title=Cellular_Automata_Method_for_Generating_Random_Cave-Like_Levels

examples/distribution/PyInstaller/main.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python
 # To the extent possible under law, the libtcod maintainers have waived all
 # copyright and related or neighboring rights for the "hello world" PyInstaller
 # example script.  This work is published from: United States.

examples/distribution/cx_Freeze/main.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python
 """cx_Freeze main script example."""
 import tcod.console
 import tcod.context

examples/distribution/cx_Freeze/setup.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python
 import sys
 
 from cx_Freeze import Executable, setup  # type: ignore

examples/eventget.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python
 # To the extent possible under law, the libtcod maintainers have waived all
 # copyright and related or neighboring rights for this example.  This work is
 # published from: United States.

examples/framerate.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python
 # To the extent possible under law, the libtcod maintainers have waived all
 # copyright and related or neighboring rights for this example.  This work is
 # published from: United States.