[PATCH proxmox-i18n 6/7] make: add --previous flag to msgmerge

[Maximiliano Sandoval <m.sandoval@proxmox.com>]

When marking a string as fuzzy, this adds a hint with the previous msgid, e.g.

    #: pve-manager/www/manager6/ceph/OSD.js:557
    #, fuzzy
    #| msgid "Apply"
    msgid "Apply to"
    msgstr "Aplicar"

would show that the previous msgid was Apply. This might be picked up by the
translator editor.

This provides context to translators and help determining if and how the msgstr
should be adjusted.

Signed-off-by: Maximiliano Sandoval <m.sandoval@proxmox.com>
---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 4934b360..24ef7e3b 100644
--- a/Makefile
+++ b/Makefile
@@ -189,7 +189,7 @@ update_pot: submodule
 do_update:
 	$(MAKE) update_pot
 	$(MAKE) messages.pot
-	for i in $(LINGUAS); do echo -n "$$i: "; msgmerge --sort-output --verbose --update $$i.po messages.pot; done;
+	for i in $(LINGUAS); do echo -n "$$i: "; msgmerge --sort-output --verbose --update --previous $$i.po messages.pot; done;
 
 update:
 	git submodule foreach 'git pull --ff-only origin master'
-- 
2.47.3