Pad glob with space so works for single file

workflow/main.nf

@@ -19,7 +19,7 @@ params.index = "/project/apps_database/iGenomes/Homo_sapiens/UCSC/hg19/Sequence/
 // First, get the list of fastqs. When multiple files are selected on the web
 // interface they will be passed as a comma-separated list. Therefore we use the
 // { pattern1,pattern2 } glob syntax to pick all them up.
-fastqs = Channel.fromPath( "{" + params.fastq+ ",}" )
+fastqs = Channel.fromPath( "{" + params.fastq+ ", }" )
 // Now find the path to the BWA index directory
 index_path = file(params.index).parent
 // And get the name of the actual index inside that directory