Split 'slop' man page options to their own lines

The slop testing options are the only spot where we try to enumerate multiple
options on the same line. Changing them to each be on their own line as we do
elsewhere.

doc/tor.1.txt

@@ -2459,8 +2459,10 @@ The following options are used for running a testing Tor network.
     key.
     (Default: 2 days)
 
-[[TestingLinkKeySlop]] **TestingLinkKeySlop** __N__ **seconds**|**minutes**|**hours**::
-[[TestingAuthKeySlop]] **TestingAuthKeySlop** __N__ **seconds**|**minutes**|**hours**::
+[[TestingLinkKeySlop]] **TestingLinkKeySlop** __N__ **seconds**|**minutes**|**hours** +
+
+[[TestingAuthKeySlop]] **TestingAuthKeySlop** __N__ **seconds**|**minutes**|**hours** +
+
 [[TestingSigningKeySlop]] **TestingSigningKeySlop** __N__ **seconds**|**minutes**|**hours**::
     How early before the official expiration of a an Ed25519 signing key do
     we replace it and issue a new key?