Fixed samtools custom view context errors

    }

    input:

    tuple val(meta), path(bam)

    tuple val(meta), path(bai)

    tuple val(meta), path(bam), path(bai)

    output:

    tuple val(meta), path("*.txt") , emit: tsv

        )

        //AWK_FRAG_BIN.out.file | view

        /*

        * CHANNEL: Combine bam and bai files on id

        */

        ch_samtools_bam

            .map { row -> [row[0].id, row ].flatten()}

            .join ( ch_samtools_bai.map { row -> [row[0].id, row ].flatten()} )

            .map { row -> [row[1], row[2], row[4]] }

            .set { ch_bam_bai }

        // EXAMPLE CHANNEL STRUCT: [[META], BAM, BAI]

        //ch_bam_bai | view

        /*

        * MODULE: Calculate fragment lengths

        */

        SAMTOOLS_CUSTOMVIEW (

            ch_samtools_bam,

            ch_samtools_bai

            ch_bam_bai

        )

        //SAMTOOLS_CUSTOMVIEW.out.tsv | view

    }

            .join ( ch_seacr_bed.map { row -> [row[0].id, row ].flatten()} )

            .map { row -> [row[1], row[2], row[4], row[6]] }

            .set { ch_bam_bai_bed }

        // EXAMPLE CHANNEL STRUCT: [[META], BAM, BED]

        // EXAMPLE CHANNEL STRUCT: [[META], BAM, BAI, BED]

        //ch_bam_bai_bed | view

        /*