update translations for 6.0/master

and force-fix errors using pocheck

Change-Id: Ie978deb62c62ea4ad661ea45d155bdd4b0d1f811

source/it/formula/messages.po

@@ -13,7 +13,7 @@ msgstr ""
 "Content-Transfer-Encoding: 8bit\n"
 "Plural-Forms: nplurals=2; plural=(n != 1);\n"
 "X-Accelerator-Marker: ~\n"
-"X-Generator: Pootle 2.8\n"
+"X-Generator: LibreOffice\n"
 "X-POOTLE-MTIME: 1512999545.000000\n"
 
 #: core_resource.hrc:2258
@@ -2114,14 +2114,16 @@ msgid "Array"
 msgstr "Matrice"
 
 #: formuladialog.ui:57
+#, fuzzy
 msgctxt "formuladialog|back"
 msgid "< _Back"
-msgstr ""
+msgstr "<< _Indietro"
 
 #: formuladialog.ui:72
+#, fuzzy
 msgctxt "formuladialog|next"
 msgid "_Next >"
-msgstr ""
+msgstr "_Successivo >>"
 
 #: formuladialog.ui:158
 msgctxt "formuladialog|function"