fix: epubs would have a "null" comment in the Media

komga/src/main/kotlin/org/gotson/komga/domain/service/BookAnalyzer.kt

@@ -202,7 +202,12 @@ class BookAnalyzer(
           .map { it.fileName }
           .ifEmpty { null }
           ?.joinToString(prefix = "ERR_1033 [", postfix = "]") { it }
-      val allErrors = (errors + entriesErrorSummary).joinToString(" ")
+
+      val allErrors =
+        (errors + entriesErrorSummary)
+          .filterNotNull()
+          .joinToString(" ")
+          .ifBlank { null }
 
       return Media(
         status = Media.Status.READY,

komga/src/test/kotlin/org/gotson/komga/domain/service/BookAnalyzerTest.kt

@@ -162,6 +162,18 @@ class BookAnalyzerTest(
       assertThat(media.pages).hasSize(0)
     }
 
+    @Test
+    fun `given regular epub archive when analyzing then comment is empty`() {
+      val file = ClassPathResource("epub/The Incomplete Theft - Ralph Burke.epub")
+      val book = Book("book", file.url, LocalDateTime.now())
+
+      val media = bookAnalyzer.analyze(book, false)
+
+      assertThat(media.mediaType).isEqualTo("application/epub+zip")
+      assertThat(media.status).isEqualTo(Media.Status.READY)
+      assertThat(media.comment).isNull()
+    }
+
     @Test
     fun `given epub archive when toc cannot be extracted then media status is READY with comments`() {
       val file = ClassPathResource("epub/The Incomplete Theft - Ralph Burke.epub")