fix missing space after toolcommand

biopet.wdl

@@ -355,7 +355,7 @@ task ValidateFastq {
     command {
         set -e -o pipefail
         ${preCommand}
-        ${toolCommand}\
+        ${toolCommand} \
         --fastq1 ${fastq1} \
         ${"--fastq2 " + fastq2}
     }
@@ -386,7 +386,7 @@ task ValidateVcf {
     command {
         set -e -o pipefail
         ${preCommand}
-        ${toolCommand}\
+        ${toolCommand} \
         -i ${vcfFile} \
         -R ${refFasta}
     }