Add pg_dump TODO.detail for multiple -t / -n flags.

doc/TODO.detail/pg_dump

@@ -1256,7 +1256,7 @@ a script to loop through the desired schema/table combinations and
 dumping each one at a time.
 
 Is command line quoting really that much of a hassle?  And if so, what 
-are the major hurdles?
+are the major hurdles? 
 
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 TIP 4: Don't 'kill -9' the postmaster