makepot: Remove --join-existing flag and format for readability.

xgettext is only executed once, so this was always re-using the
existing file and never dropping obsolete strings.

Author: mtwebster

makepot

@@ -5,5 +5,18 @@ intltool-extract --type=gettext/glade usr/share/linuxmint/mintupdate/kernels.ui
 intltool-extract --type=gettext/glade usr/share/linuxmint/mintupdate/main.ui
 intltool-extract --type=gettext/glade usr/share/linuxmint/mintupdate/preferences.ui
 intltool-extract --type=gettext/glade usr/share/linuxmint/mintupdate/shortcuts.ui
-xgettext --language=Python -cTRANSLATORS --keyword=_ --keyword=N_ --output=mintupdate.pot --join-existing usr/lib/linuxmint/mintUpdate/*.py generate_desktop_files usr/bin/mintupdate-cli usr/bin/mint-release-upgrade usr/bin/mint-release-upgrade-root usr/bin/mintupdate-launcher usr/lib/linuxmint/mintUpdate/aliases usr/share/linuxmint/mintupdate/*.ui.h
+xgettext --language=Python \
+         -cTRANSLATORS \
+         --keyword=_ \
+         --keyword=N_ \
+         --output=mintupdate.pot \
+         usr/lib/linuxmint/mintUpdate/*.py \
+         generate_desktop_files \
+         usr/bin/mintupdate-cli \
+         usr/bin/mint-release-upgrade \
+         usr/bin/mint-release-upgrade-root \
+         usr/bin/mintupdate-launcher \
+         usr/lib/linuxmint/mintUpdate/aliases \
+         usr/share/linuxmint/mintupdate/*.ui.h
+
 rm -f usr/share/linuxmint/mintupdate/*.ui.h