diff --git a/cmd/root.go b/cmd/root.go
index b786549..5babaea 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -51,8 +51,8 @@ var helptemplate string = `{{with or .Long .Short }}{{. | trim}}
 {{if or .Runnable .HasSubCommands}}{{.UsageString}}{{end}}
 
 If you use the Gotree/Goalign toolkit, please cite:
-Lemoine F, Gascuel O. 
-Gotree/Goalign: toolkit and Go API to facilitate the development of phylogenetic workflows. 
+Lemoine F, Gascuel O.
+Gotree/Goalign: toolkit and Go API to facilitate the development of phylogenetic workflows.
 NAR Genom Bioinform. 2021 Aug 11;3(3):lqab075.
 doi: 10.1093/nargab/lqab075. PMID: 34396097; PMCID: PMC8356961.
 `