alter judge conditions

tasks/access.wdl

@@ -9,7 +9,7 @@ task access {
     String disk_size
 
     command <<
-        if [ $method == "amplicon" ]; then
+        if [ ${method}=="amplicon" ]; then
             cp ${bed} access-mappable.bed
         else
             cnvkit.py access -s ${min_gap_size} -o access-mappable.bed ${fasta}