output.md linting

docs/output.md

@@ -855,6 +855,8 @@ Germline VCFs from `DeepVariant`, `FreeBayes`, `HaplotypeCaller`, `Haplotyper`,
 
 </details>
 
+### Normalization
+
 All VCFs from `DeepVariant`, `FreeBayes`, `HaplotypeCaller`, `Haplotyper`, `Manta`, `bcftools mpileup`, `Strelka`, or `Tiddit` are normalized with `bcftools norm`. The field `SOURCE` is added to the VCF header to report the variant caller.
 
 <details markdown="1">
@@ -867,7 +869,6 @@ All VCFs from `DeepVariant`, `FreeBayes`, `HaplotypeCaller`, `Haplotyper`, `Mant
 
 </details>
 
-
 ## Variant annotation
 
 This directory contains results from the final annotation steps: two tools are used for annotation, [snpEff](http://snpeff.sourceforge.net/) and [VEP](https://www.ensembl.org/info/docs/tools/vep/index.html). Both results can also be combined by setting `--tools merge`.