Refactor ledger transaction snippet for clarity

Author: guitmz

snippets/ledger-mode/transaction

@@ -3,5 +3,5 @@
 # key: tr
 # --
 `(format-time-string "%Y-%m-%d")` ${1:Description}
-    ${2:Assets:Bank:DBK}  ${3:Amount} ${4:EUR}
-    ${5:Expenses:Unknown}
+    ${2}  ${3:Amount} ${4:EUR}
+    ${5}