Move bprint to grok.testing.

It is now used in different places, at least in `grokcore.view`.

src/grok/ftests/test_grok_functional.py

@@ -38,16 +38,6 @@ def http_call(method, path, data=None, **kw):
     return zope.app.wsgi.testlayer.http(request_string, handle_errors=False)
 
 
-def bprint(data):
-    """Python 2 and 3 doctest compatible print.
-
-    http://python3porting.com/problems.html#string-representation
-    """
-    if not isinstance(data, str):
-        data = data.decode()
-    print(data.strip())
-
-
 def suiteFromPackage(name):
     files = resource_listdir(__name__, name)
     suite = unittest.TestSuite()
@@ -64,7 +54,7 @@ def suiteFromPackage(name):
                 getRootFolder=layer.getRootFolder,
                 http=zope.app.wsgi.testlayer.http,
                 http_call=http_call,
-                bprint=bprint,
+                bprint=grok.testing.bprint,
                 wsgi_app=layer.make_wsgi_app,
             ),
             optionflags=(

src/grok/testing.py

@@ -78,3 +78,13 @@ def warn(message, category=None, stacklevel=1):
         message,
         line.strip(),
         ))
+
+
+def bprint(data):
+    """Python 2 and 3 doctest compatible print.
+
+    http://python3porting.com/problems.html#string-representation
+    """
+    if not isinstance(data, str):
+        data = data.decode()
+    print(data.strip())