tests: support multiple caps in notcapable

tests/notcapable

@@ -1,19 +1,19 b''
 # Disable the $CAP wire protocol capability.
 
 if test -z "$CAP"
 then
     echo "CAP environment variable not set."
 fi
 
 cat > notcapable-$CAP.py << EOF
 from mercurial import extensions, repo
 def extsetup():
     extensions.wrapfunction(repo.repository, 'capable', wrapper)
 def wrapper(orig, self, name, *args, **kwargs):
-    if name == '$CAP':
+    if name in '$CAP'.split(' '):
         return False
     return orig(self, name, *args, **kwargs)
 EOF
 
 echo '[extensions]' >> $HGRCPATH
 echo "notcapable-$CAP = `pwd`/notcapable-$CAP.py" >> $HGRCPATH