Update translation files

data/de.johrpan.musicus.desktop.in

@@ -1,5 +1,5 @@
 [Desktop Entry]
-Name=musicus
+Name=Musicus
 Exec=musicus
 Icon=de.johrpan.musicus
 Terminal=false

po/HACKING.md

@@ -0,0 +1,27 @@
+# Internationalization
+
+Execute the following commands from the project root directory to update
+translation files whenever translatable strings have been changed.
+
+## 1. Update `template.pot`
+
+```bash
+xgettext \
+    --from-code=UTF-8 \
+    --add-comments \
+    --keyword=_ \
+    --keyword=C_:1c,2 \
+    --files-from=po/POTFILES \
+    --output=po/template.pot
+```
+
+## 2. Update translation files
+
+```bash
+msgmerge \
+    --update \
+    --backup=off \
+    --no-fuzzy-matching \
+    po/de.po \
+    po/template.pot
+```

po/de.po

@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2023-06-28 14:50+0200\n"
+"POT-Creation-Date: 2023-07-06 14:30+0200\n"
 "PO-Revision-Date: 2023-06-28 14:58+0200\n"
 "Last-Translator:  <elias@johrpan.de>\n"
 "Language-Team: German <translation-team-de@lists.sourceforge.net>\n"
@@ -19,12 +19,12 @@ msgstr ""
 "Plural-Forms: nplurals=2; plural=(n != 1);\n"
 
 #: data/de.johrpan.musicus.desktop.in:3
-msgid "musicus"
-msgstr ""
+msgid "Musicus"
+msgstr "Musicus"
 
 #: data/de.johrpan.musicus.appdata.xml.in:7
 msgid "No description"
-msgstr ""
+msgstr "Keine Beschreibung"
 
 #: src/window.blp:20
 msgid "Hello, World!"

po/template.pot

@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2023-06-28 14:50+0200\n"
+"POT-Creation-Date: 2023-07-06 14:30+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"
@@ -18,7 +18,7 @@ msgstr ""
 "Content-Transfer-Encoding: 8bit\n"
 
 #: data/de.johrpan.musicus.desktop.in:3
-msgid "musicus"
+msgid "Musicus"
 msgstr ""
 
 #: data/de.johrpan.musicus.appdata.xml.in:7