Fix most trivially-findable print statements.

There's one major and one minor category still unfixed:
doctests are the major category (and I hope to be able to augment the
refactoring tool to refactor bona fide doctests soon);
other code generating print statements in strings is the minor category.

(Oh, and I don't know if the compiler package works.)

Lib/test/crashers/bogus_sre_bytecode.py

@@ -38,7 +38,7 @@ ss = ["", "world", "x" * 500]
 
 while 1:
     code = [pick() for i in range(random.randrange(5, 25))]
-    print code
+    print(code)
     pat = _sre.compile(None, 0, code)
     for s in ss:
         try:

Lib/test/crashers/borrowed_ref_1.py

@@ -8,7 +8,7 @@ class A(object):
 
 class B(object):
     def __del__(self):
-        print 'hi'
+        print('hi')
         del D.__missing__
 
 class D(dict):

Lib/test/crashers/borrowed_ref_2.py

@@ -10,7 +10,7 @@ class A(object):
 
 class B(object):
     def __del__(self):
-        print "hi"
+        print("hi")
         del C.d
 
 class D(object):

Lib/test/crashers/gc_inspection.py

@@ -25,8 +25,8 @@ def g():
     yield marker
     # now the marker is in the tuple being constructed
     [tup] = [x for x in gc.get_referrers(marker) if type(x) is tuple]
-    print tup
-    print tup[1]
+    print(tup)
+    print(tup[1])
 
 
 tuple(g())

Lib/test/crashers/loosing_mro_ref.py

@@ -32,5 +32,5 @@ class X(Base):
     # there from the beginning :-)
     locals()[MyKey()] = 5
 
-print X.mykey
+print(X.mykey)
 # I get a segfault, or a slightly wrong assertion error in a debug build.

Lib/test/crashers/modify_dict_attr.py

@@ -16,4 +16,4 @@ class MyClass(object):
 
 if __name__ == '__main__':
     del MyClass.__dict__  # if we set tp_dict to NULL,
-    print MyClass         # doing anything with MyClass segfaults
+    print(MyClass)         # doing anything with MyClass segfaults

Lib/test/crashers/nasty_eq_vs_dict.py

@@ -44,4 +44,4 @@ dict = {y: "OK!"}
 
 z = Yuck()
 y.make_dangerous()
-print dict[z]
+print(dict[z])