fix: add, commodities, diff: support the --conf and -n/--no-conf flags [#2446]

hledger/Hledger/Cli/Commands/Add.hs

@@ -53,7 +53,7 @@ addmode = hledgerCommandMode
   $(embedFileRelative "Hledger/Cli/Commands/Add.txt")
   [flagNone ["no-new-accounts"]  (setboolopt "no-new-accounts") "don't allow creating new accounts"]
   [generalflagsgroup2]
-  []
+  confflags
   ([], Just $ argsFlag "[-f JOURNALFILE] [DATE [DESCRIPTION [ACCOUNT1 [ETC..]]]]]")
 
 -- | State used while entering transactions.

hledger/Hledger/Cli/Commands/Commodities.hs

@@ -32,7 +32,7 @@ commoditiesmode = hledgerCommandMode
   ,flagNone ["unused"]       (setboolopt "unused")     "list commodities declared but not used"
   ]
   [generalflagsgroup2]
-  []
+  confflags
   ([], Just $ argsFlag "[QUERY..]")
 
 commodities :: CliOpts -> Journal -> IO ()

hledger/Hledger/Cli/Commands/Diff.hs

@@ -30,7 +30,7 @@ diffmode = hledgerCommandMode
   $(embedFileRelative "Hledger/Cli/Commands/Diff.txt")
   []
   [generalflagsgroup2]
-  []
+  confflags
   ([], Just $ argsFlag "-f FILE1 -f FILE2 FULLACCOUNTTNAME")
 
 data PostingWithPath = PostingWithPath {