;doc: update CLI usage texts

hledger/Hledger/Cli/Commands/Accounts.txt

@@ -11,6 +11,9 @@ by matched postings are shown. It shows a flat list by default. With
 you can add --drop N to omit the first few account name components.
 Account names can be depth-clipped with depth:N or --depth N or -N.
 
+With --types, it also shows each account's type, if it's known. (See
+Declaring accounts > Account types.)
+
 Examples:
 
 $ hledger accounts

hledger/Hledger/Cli/Commands/Aregister.txt

@@ -47,6 +47,12 @@ Each aregister line item shows:
 Transactions making a net change of zero are not shown by default; add
 the -E/--empty flag to show them.
 
+For performance reasons, column widths are chosen based on the first
+1000 lines; this means unusually wide values in later lines can cause
+visual discontinuities as column widths are adjusted. If you want to
+ensure perfect alignment, at the cost of more time and memory, use the
+--align-all flag.
+
 This command also supports the output destination and output format
 options. The output formats supported are txt, csv, and json.
 

hledger/Hledger/Cli/Commands/Register.txt

@@ -22,6 +22,12 @@ $ hledger register checking
 
 With --date2, it shows and sorts by secondary date instead.
 
+For performance reasons, column widths are chosen based on the first
+1000 lines; this means unusually wide values in later lines can cause
+visual discontinuities as column widths are adjusted. If you want to
+ensure perfect alignment, at the cost of more time and memory, use the
+--align-all flag.
+
 The --historical/-H flag adds the balance from any undisplayed prior
 postings to the running total. This is useful when you want to see only
 recent activity, with a historically accurate running balance:

hledger/Hledger/Cli/Commands/Tags.txt

@@ -1,15 +1,26 @@
 tags
-List the unique tag names used in the journal. With a TAGREGEX argument,
+List the tags used in the journal, or their values.
-only tag names matching the regular expression (case insensitive) are
-shown. With QUERY arguments, only transactions matching the query are
-considered.
-
-With the --values flag, the tags' unique values are listed instead.
-
-With --parsed flag, all tags or values are shown in the order they are
-parsed from the input data, including duplicates.
-
-With -E/--empty, any blank/empty values will also be shown, otherwise
-they are omitted.
 
 _FLAGS
+
+This command lists the tag names used in the journal, whether on
+transactions, postings, or account declarations.
+
+With a TAGREGEX argument, only tag names matching this regular
+expression (case insensitive, infix matched) are shown.
+
+With QUERY arguments, only transactions and accounts matching this query
+are considered. If the query involves transaction fields (date:, desc:,
+amt:, ...), the search is restricted to the matched transactions and
+their accounts.
+
+With the --values flag, the tags' unique non-empty values are listed
+instead. With -E/--empty, blank/empty values are also shown.
+
+With --parsed, tags or values are shown in the order they were parsed,
+with duplicates included. (Except, tags from account declarations are
+always shown first.)
+
+Tip: remember, accounts also acquire tags from their parents, postings
+also acquire tags from their account and transaction, transactions also
+acquire tags from their postings.