rename output for collatekmer

src/modules/mergekmer.nf

@@ -36,13 +36,13 @@ process COLLATEKMER {
     path(csv)
 
     output:
-    tuple path("*.csv"), emit: csv
+    path("*.csv"), emit: csv
     path "versions.yml", emit: versions
 
     script:
     def args = task.ext.args ?: ''
     """
-    mergekmer --csv ${csv} --output final.csv --collate
+    mergekmer --csv ${csv} --output ${csv[1].simpleName}.csv --collate
 
 
     cat <<-END_VERSIONS > versions.yml