Test-suite: Unify string quoting in the Python sources

Examples/test-suite/python/argcargvtest_runme.py

@@ -1,21 +1,21 @@
 from argcargvtest import *
 
-largs = ['hi', 'hola', 'hello']
+largs = ["hi", "hola", "hello"]
 if mainc(largs) != 3:
     raise RuntimeError("bad main typemap")
 
-targs = ('hi', 'hola')
-if mainv(targs, 1) != 'hola':
+targs = ("hi", "hola")
+if mainv(targs, 1) != "hola":
     print(mainv(targs, 1))
     raise RuntimeError("bad main typemap")
 
-targs = ('hi', 'hola')
-if mainv(targs, 1) != 'hola':
+targs = ("hi", "hola")
+if mainv(targs, 1) != "hola":
     raise RuntimeError("bad main typemap")
 
 try:
     error = 0
-    mainv('hello', 1)
+    mainv("hello", 1)
     error = 1
 except TypeError:
     pass