Allow splitting 1945-48

tests/NodaTimeSplitterTest.php

@@ -450,6 +450,19 @@ final class NodaTimeSplitterTest extends TestCase {
         self::assertEquals($output->toTimeName(), "1901-2000");
         self::assertEquals(NodaTimeSplitter::timePartsToCountingYear($output), 1951);
 
+        $output = NodaTimeSplitter::attempt_splitting("1945-48");
+        self::assertNotEmpty($output);
+        self::assertEquals($output->toOldFormat(), [
+            0 => "1945",
+            1 => "1948",
+            2 => "00",
+            3 => "00",
+            4 => "+",
+            5 => "",
+        ]);
+        self::assertEquals($output->toTimeName(), "1945-1948");
+        self::assertEquals(NodaTimeSplitter::timePartsToCountingYear($output), 1947);
+
         $output = NodaTimeSplitter::attempt_splitting("20.-19. Jahrhundert v. Chr.");
         self::assertNotEmpty($output);
         self::assertEquals($output->toOldFormat(), [