Bowtie2: change toList to collect

src/nf_modules/Bowtie2/bowtie2.nf

@@ -64,7 +64,7 @@ process mapping_fastq {
 
   input:
   set pair_id, file(reads) from fastq_files
-  file index from index_files.toList()
+  file index from index_files.collect()
 
   output:
   set pair_id, "*.bam" into bam_files
@@ -114,7 +114,7 @@ process mapping_fastq {
 
   input:
   file reads from fastq_files
-  file index from index_files.toList()
+  file index from index_files.collect()
 
   output:
   file "*.bam" into bam_files

src/nf_modules/Bowtie2/tests/mapping_paired.nf

@@ -20,7 +20,7 @@ process mapping_fastq {
 
   input:
   set pair_id, file(reads) from fastq_files
-  file index from index_files.toList()
+  file index from index_files.collect()
 
   output:
   set pair_id, "*.bam" into bam_files

src/nf_modules/Bowtie2/tests/mapping_single.nf

@@ -19,7 +19,7 @@ process mapping_fastq {
 
   input:
   file reads from fastq_files
-  file index from index_files.toList()
+  file index from index_files.collect()
 
   output:
   file "*.bam" into bam_files