Merge pull request #507 from pstew/fix_505

Remove duplicated attribute in docs/writing/bwa-mem_v5.xml

Author: nsoranzo

docs/writing/bwa-mem_v5.xml

@@ -42,7 +42,7 @@
                  <param name="fastq_input1" type="data" format="fastqsanger" label="Select fastq dataset" help="Specify dataset with single reads"/>
             </when>
             <when value="paired_collection">
-                 <param name="fastq_input" format="fastqsanger" type="data_collection" collection_type="paired" label="Select a paired collection" label="Select dataset pair" help="Specify paired dataset collection containing paired reads"/>
+                 <param name="fastq_input" format="fastqsanger" type="data_collection" collection_type="paired" label="Select a paired collection" help="Specify paired dataset collection containing paired reads"/>
             </when>
         </conditional>
         <conditional name="algorithm">