imp: journal: ignore tag subdirectives (ledger compat)

hledger-lib/Hledger/Read/JournalReader.hs

@@ -578,6 +578,7 @@ tagdirectivep = do
   lift skipNonNewlineSpaces1
   _ <- lift $ some nonspace
   lift restofline
+  skipMany indentedlinep
   return ()
 
 endtagdirectivep :: JournalParser m ()

hledger/hledger.m4.md

@@ -2749,6 +2749,7 @@ capture ACCT REGEX
 check   EXPR
 define  VAR=EXPR
 expr    EXPR
+tag     NAME
 --command-line-flag
 ```
 

hledger/test/ledger-compat/syntax/hledger-other.test

@@ -55,6 +55,9 @@ check 1
 define var_name=$100
 expr 1
 N USD
+tag Receipt
+  check value =~ /pattern/
+  assert value != "foobar"
 --command-line-flag
 
 $ hledger -f- check