;doc: demote COMMON TASKS subheadings

hledger/hledger.m4.md

@@ -6787,7 +6787,7 @@ _commands_
 
 Here are some quick examples of how to do some basic tasks with hledger.
 
-# Getting help
+## Getting help
 
 Here's how to list commands and view options and command docs:
 
@@ -6808,7 +6808,7 @@ $ hledger help --help    # find out more about the help command
 To view manuals and introductory docs on the web, visit <https://hledger.org>.
 Chat and mail list support and discussion archives can be found at <https://hledger.org/support>.
 
-# Constructing command lines
+## Constructing command lines
 
 hledger has a flexible command line interface.
 We strive to keep it simple and ergonomic, but if you run into one of
@@ -6821,7 +6821,7 @@ here are some tips that might help:
 - if needed, also add a backslash to hide regular expression metacharacters from the shell
 - to see how a misbehaving command line is being parsed, add `--debug=2`.
 
-# Starting a journal file
+## Starting a journal file
 
 hledger looks for your accounting data in a journal file, `$HOME/.hledger.journal` by default:
 ```cli
@@ -6856,7 +6856,7 @@ Commodities              : 0 ()
 Market prices            : 0 ()
 ```
 
-# Setting LEDGER_FILE
+## Setting LEDGER_FILE
 
 How to set `LEDGER_FILE` permanently depends on your setup:
 
@@ -6895,7 +6895,7 @@ or try running these commands in a powershell window
 When correctly configured, in a new terminal window `$env:LEDGER_FILE` will show the file path,
 and so will `hledger files`.
 
-# Setting opening balances
+## Setting opening balances
 
 Pick a starting date for which you can look up the balances of some
 real-world assets (bank accounts, wallet..) and liabilities (credit cards..).
@@ -6971,7 +6971,7 @@ If you're using version control, this could be a good time to commit the journal
 $ git commit -m 'initial balances' 2023.journal
 ```
 
-# Recording transactions
+## Recording transactions
 
 As you spend or receive money, you can record these transactions
 using one of the methods above (text editor, hledger add)
@@ -6995,7 +6995,7 @@ and hledger.org for more ideas:
   assets:bank:checking    $1000
 ```
 
-# Reconciling
+## Reconciling
 
 Periodically you should reconcile - compare your hledger-reported balances
 against external sources of truth, like bank statements or your bank's website -
@@ -7047,7 +7047,7 @@ If you're using version control, this can be another good time to commit:
 $ git commit -m 'txns' 2023.journal
 ```
 
-# Reporting
+## Reporting
 
 Here are some basic reports.
 
@@ -7195,7 +7195,7 @@ $ hledger activity -W
 2023-01-06 ****
 2023-01-13 ****
 ```
-# Migrating to a new file
+## Migrating to a new file
 
 At the end of the year, you may want to continue your journal in a new file,
 so that old transactions don't slow down or clutter your reports,