;doc: update CLI usage texts

hledger/Hledger/Cli/Commands/Accounts.txt

@@ -6,14 +6,23 @@ _FLAGS
 This command lists account names, either declared with account
 directives (--declared), posted to (--used), or both (the default). With
 query arguments, only matched account names and account names referenced
-by matched postings are shown. It shows a flat list by default. With
---tree, it uses indentation to show the account hierarchy. In flat mode
-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.
+by matched postings are shown.
+
+It shows a flat list by default. With --tree, it uses indentation to
+show the account hierarchy. In flat mode 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.)
 
+With --positions, it also shows the file and line number of each
+account's declaration, if any, and the account's overall declaration
+order; these may be useful when troubleshooting account display order.
+
+With --directives, it adds the account keyword, showing valid account
+directives which can be pasted into a journal file.
+
 Examples:
 
 $ hledger accounts

hledger/Hledger/Cli/Commands/Check.txt

@@ -15,6 +15,9 @@ hledger check      # basic checks
 hledger check -s   # basic + strict checks
 hledger check ordereddates payees  # basic + two other checks
 
+If you are an Emacs user, you can also configure flycheck-hledger to run
+these checks, providing instant feedback as you edit the journal.
+
 Here are the checks currently available:
 
 Basic checks
@@ -57,8 +60,7 @@ therefore optional:
 -   payees - all payees used by transactions have been declared
 
 -   recentassertions - all accounts with balance assertions have a
-    balance assertion, marked cleared, within 7 days of their latest
-    posting
+    balance assertion no more than 7 days before their latest posting
 
 -   uniqueleafnames - all account leaf names are unique
 
@@ -75,3 +77,17 @@ https://github.com/simonmichael/hledger/tree/master/bin:
 
 You could make similar scripts to perform your own custom checks. See:
 Cookbook -> Scripting.
+
+More about specific checks
+
+hledger check recentassertions will complain if any balance-asserted
+account does not have a balance assertion within 7 days before its
+latest posting. This aims to prevent the situation where you are
+regularly updating your journal, but forgetting to check your balances
+against the real world, then one day must dig back through months of
+data to find an error. It assumes that adding a balance assertion
+requires/reminds you to check the real-world balance. That may not be
+true if you auto-generate balance assertions from bank data; in that
+case, I recommend to import transactions uncleared, then use the
+manual-review-and-mark-cleared phase as a reminder to check the latest
+assertions against real-world balances.

hledger/Hledger/Cli/Commands/Help.txt

@@ -2,11 +2,9 @@ help
 Show the hledger user manual in one of several formats, optionally
 positioned at a given TOPIC (if possible).
 
-TOPIC is any heading in the manual, or the start of any heading (but not
-the middle). It is case insensitive.
-
-Some examples: commands, print, forecast, "auto postings",
-"commodity column".
+TOPIC is any heading in the manual, or a heading prefix, case
+insensitive. Eg: commands, print, forecast, "auto postings", journal,
+amount.
 
 _FLAGS
 
@@ -18,3 +16,9 @@ By default it uses the best viewer it can find in $PATH, in this order:
 info, man, $PAGER (unless a topic is specified), less, or stdout. When
 run non-interactively, it always uses stdout. Or you can select a
 particular viewer with the -i (info), -m (man), or -p (pager) flags.
+
+Examples
+
+$ hledger help --help    # show how the help command works
+$ hledger help           # show the hledger manual with info, man or $PAGER
+$ hledger help journal   # show the journal topic in the hledger manual