cli, help: usage tweaks

[ci skip]

hledger/Hledger/Cli/Help.hs

@@ -32,7 +32,7 @@ import Hledger.Cli.DocFiles
 --import Hledger.Utils.Debug
 
 helpmode = (defCommandMode $ ["help"] ++ aliases) {
-  modeHelp = "show any of the hledger manuals, as plain text. With no argument, list the manuals." `withAliases` aliases
+  modeHelp = "show any of the hledger manuals, choosing the most suitable viewer (info, man, a pager, or stdout). With no argument, list the manuals." `withAliases` aliases
  ,modeGroupFlags = Group {
      groupUnnamed = [
       flagNone ["info"]  (setboolopt "info")  "show the manual with info"

hledger/Hledger/Cli/Main.hs

@@ -81,7 +81,7 @@ import Hledger.Utils
 mainmode addons = defMode {
   modeNames = [progname ++ " [CMD]"]
  ,modeArgs = ([], Just $ argsFlag "[ARGS]")
- ,modeHelp = unlines ["hledger's command line interface"]
+ ,modeHelp = unlines ["hledger's main command line interface. Runs builtin commands and other hledger executables. Type \"hledger\" to list available commands."]
  ,modeGroupModes = Group {
     -- subcommands in the unnamed group, shown first:
     groupUnnamed = [