Python shebang modernisation for python3

PEP-394 recommends specifying python2 or python3 in shebangs unless the
script is known to only run in an activated virtual environment.

PEP-394 also says distributors may not provide the python command.
Newer versions of Ubuntu, at least, no longer provide python unless the
python-is-python3 package is explicitly installed.

Removed some shebangs from testcases (the test-suite does not need them).

Doc/Manual/Makefile

@@ -22,7 +22,7 @@ HTMLDOC_OPTIONS = "--book --toclevels 4 --no-numbered --toctitle \"Table of Cont
 all: maketoc check generate
 
 maketoc:
-	python maketoc.py
+	python3 maketoc.py
 
 # Use this to regenerate CCache.html should this ever be needed
 CCache.html: ../../CCache/ccache.yo
@@ -48,7 +48,7 @@ generate: SWIGDocumentation.html
 
 SWIGDocumentation.html: swightml.book
 	htmldoc --batch swightml.book || true
-	python fixstyle.py SWIGDocumentation.html
+	python3 fixstyle.py SWIGDocumentation.html
 
 swightml.book: chapters Sections.html
 	echo "#HTMLDOC 1.8.24" > swightml.book

Doc/Manual/Python.html

@@ -319,7 +319,7 @@ Here is a sample <tt>setup.py</tt> file for the above example:
 
 <div class="code">
 <pre>
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 """
 setup.py file for SWIG example

Doc/Manual/fixstyle.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python3
 
 # Replace the inline htmldoc stylesheet with the SWIG stylesheet
 

Doc/Manual/makechap.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 ###############################################################################
 # Takes a chapter as input and adds internal links and numbering to all

Doc/Manual/maketoc.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import sys
 import os

Examples/test-suite/javascript/operbool_runme.js

@@ -1,4 +1,3 @@
-#!/usr/bin/env python
 var operbool = require("operbool");
 const b = new operbool.Test();
 if (b.operator_bool()) {

Examples/test-suite/python/cpp_static_runme.py

@@ -1,4 +1,3 @@
-#!/usr/bin/evn python
 from cpp_static import *
 
 

Examples/test-suite/python/keyword_rename_c_runme.py

@@ -1,4 +1,3 @@
-#!/usr/bin/env python
 import keyword_rename_c
 keyword_rename_c._in(1)
 keyword_rename_c._except(1)

Examples/test-suite/python/keyword_rename_runme.py

@@ -1,4 +1,3 @@
-#!/usr/bin/env python
 import keyword_rename
 keyword_rename._in(1)
 keyword_rename._in(_except=1)

Examples/test-suite/python/operbool_runme.py

@@ -1,4 +1,3 @@
-#!/usr/bin/env python
 import operbool
 if operbool.Test():
     raise RuntimeError("operbool failed")

Tools/obs-buildlogs.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import os
 import subprocess

Tools/pyname_patch.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 """
 From SWIG 1.3.37 we deprecated all SWIG symbols that start with Py,
 since they are inappropriate and discouraged in Python documentation

Tools/testflags.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 def get_cflags(language, std, compiler):
     if std == None or len(std) == 0: