update translations for master/6.3

and force-fix errors using pocheck

Change-Id: I04bf6657f97cf2dc94f272f401bc961a60d2fc54

source/eu/starmath/messages.po

@@ -3,7 +3,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: https://bugs.libreoffice.org/enter_bug.cgi?product=LibreOffice&bug_status=UNCONFIRMED&component=UI\n"
-"POT-Creation-Date: 2019-05-31 18:44+0200\n"
+"POT-Creation-Date: 2019-06-11 12:55+0200\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -1646,12 +1646,12 @@ msgstr "Adibideak"
 #: starmath/inc/strings.hrc:285
 msgctxt "RID_EXAMPLE_CIRCUMFERENCE_HELP"
 msgid "Circumference"
-msgstr ""
+msgstr "Zirkunferentzia"
 
 #: starmath/inc/strings.hrc:286
 msgctxt "RID_EXAMPLE_MASS_ENERGY_EQUIV_HELP"
 msgid "Mass–energy equivalence"
-msgstr ""
+msgstr "Masa-energia baliokidetasuna"
 
 #: starmath/inc/strings.hrc:287
 msgctxt "RID_EXAMPLE_PYTHAGOREAN_THEO_HELP"
@@ -1661,12 +1661,12 @@ msgstr "Pitagorasen teorema"
 #: starmath/inc/strings.hrc:288
 msgctxt "RID_EXAMPLE_A_SIMPLE_SERIES_HELP"
 msgid "A simple series"
-msgstr ""
+msgstr "Serie sinple bat"
 
 #: starmath/inc/strings.hrc:289
 msgctxt "RID_EXAMPLE_GAUSS_DISTRIBUTION_HELP"
 msgid "Gauss distribution"
-msgstr ""
+msgstr "Gauss banaketa"
 
 #: starmath/inc/strings.hrc:291
 msgctxt "RID_FONTREGULAR"
@@ -1991,7 +1991,7 @@ msgstr "Elementuak"
 #: starmath/uiconfig/smath/ui/dockingelements.ui:27
 msgctxt "dockingelements|ElementCategories|tooltip_text"
 msgid "Element categories"
-msgstr ""
+msgstr "Elementu-kategoriak"
 
 #: starmath/uiconfig/smath/ui/fontdialog.ui:16
 msgctxt "fontdialog|FontDialog"