Merge branch 'master' into 2.0-last-part

extra/remove-empty-lang-keys.js

@@ -0,0 +1,25 @@
+// For #5231
+
+const fs = require("fs");
+
+let path = "../src/lang";
+
+// list directories in the lang directory
+let jsonFileList = fs.readdirSync(path);
+
+for (let jsonFile of jsonFileList) {
+    if (!jsonFile.endsWith(".json")) {
+        continue;
+    }
+
+    let jsonPath = path + "/" + jsonFile;
+    let langData = JSON.parse(fs.readFileSync(jsonPath, "utf8"));
+
+    for (let key in langData) {
+        if (langData[key] === "") {
+            delete langData[key];
+        }
+    }
+
+    fs.writeFileSync(jsonPath, JSON.stringify(langData, null, 4) + "\n");
+}