Remove accidentally duplicated array elements, change indentation and more

- extract code into a separate function "getBaseFileName"

Author: RSeidelsohn

lib/license-files.js

@@ -1,32 +1,36 @@
 import path from 'node:path';
 
 const BASENAMES_PRECEDENCE = [
-    /^LICENSE$/,
-    /^LICENSE\-\w+$/, // e.g. LICENSE-MIT
-    /^LICENCE$/,
-    /^LICENCE\-\w+$/, // e.g. LICENCE-MIT
-    /^MIT-LICENSE$/,
-    /^COPYING$/,
-    /^README$/, // TODO: should we really include README?
+	/^LICENSE$/,
+	/^LICENSE\-\w+$/, // e.g. LICENSE-MIT
+	/^MIT-LICENSE$/,
+	/^COPYING$/,
+	/^README$/, // TODO: should we really include README?
 ];
 
 // Find and list license files in the precedence order
 const licenseFiles = (dirFiles) => {
-    const files = [];
+	const files = [];
 
-    BASENAMES_PRECEDENCE.forEach((basenamePattern) => {
-        dirFiles.some((filename) => {
-            const basename = path.basename(filename, path.extname(filename)).toUpperCase();
+	BASENAMES_PRECEDENCE.forEach((basenamePattern) => {
+		dirFiles.some((filename) => {
+			const basename = getBaseFileName(filename);
 
-            if (basenamePattern.test(basename)) {
-                files.push(filename);
-                return true;
-            }
+			if (basenamePattern.test(basename)) {
+				files.push(filename);
 
-            return false;
-        });
-    });
+				return true;
+			}
 
-    return files;
+			return false;
+		});
+	});
+
+	return files;
+};
+
+const getBaseFileName = (filename) => {
+	return path.basename(filename, path.extname(filename)).toUpperCase();
 };
+
 export { licenseFiles };