More email package fixes.

Fix a couple of tests since .body_encode()'s arguments have changed.  Also, I
think body_encode() should take a string not a byte array for consistency with
the rest of the api (but I'm not positive about this).  In
quoprimime.body_encode(), body_check() must be passed an int.

Current status: 7F (no errors!)

Lib/email/quoprimime.py

@@ -189,7 +189,7 @@ def body_encode(body, maxlinelen=76, eol=NL):
         for j in range(linelen):
             c = line[j]
             prev = c
-            if body_check(c):
+            if body_check(ord(c)):
                 c = quote(c)
             elif j+1 == linelen:
                 # Check for whitespace at end of line; special case