Take ledger-default-date-format in to account for sorting

[MikiDi]

SPC m C (ledger-mode-clean-buffer) doesn't sort as expected in case of a non-alphabetically sorting date format.
Configuring my default date format doesn't change anything to this.

(defun dotspacemacs/user-config ()
  "Configuration for user code:
This function is called at the very end of Spacemacs startup, after layer
configuration.
Put your configuration code here, except for variables that should be set
before packages are loaded."
  (setq ledger-default-date-format "%d/%m/%Y")
  (setq ledger-init-file-name "/home/michael/.ledgerrc")
)

This might be due to ledger/ledger#1068 , but then the wording sort chronologically in ledger-mode sources is at least a little misleading.

[codin86]

I just gave the commit referenced above a try. It seems that it actually addresses a different issue than the one reported here. The code with the commit does not sort a ledger buffer by date. It looks like it ignores (or does not understand) the date format defined in ledger-default-date-format.