MangaRock.es: Fixed description parsing (#10305)

src/en/mangarockes/build.gradle

@@ -6,7 +6,7 @@ ext {
     extName = 'MangaRock.es'
     pkgNameSuffix = 'en.mangarockes'
     extClass = '.MangaRockEs'
-    extVersionCode = 2
+    extVersionCode = 3
 }
 
 apply from: "$rootDir/common.gradle"

src/en/mangarockes/src/eu/kanade/tachiyomi/extension/en/mangarockes/MangaRockEs.kt

@@ -127,7 +127,7 @@ class MangaRockEs : ParsedHttpSource() {
                 }
             }
             genre = document.select("div.tags a").joinToString { it.text() }
-            description = document.select("div.full.summary p").filterNot { it.text().isNullOrEmpty() }.joinToString("\n")
+            description = document.select("div.full.summary p").joinToString("\n") { it.text() }.trim()
         }
     }