Fix pylint error

validate/__main__.py

@@ -104,7 +104,7 @@ def vcf_case():
     def fastq_case():
         if file_extension in ('.fastq', '.fq'):
             warnings.warn('Warning: fastq or fq file is not zipped')
-    
+
     def unsupported_case():
         raise TypeError('File type not yet supported by PipeVal.')