Minor markdown formatting fix

So that https://pkg.go.dev/github.com/dustin/go-humanize#FormatFloat
renders it correctly
diff --git a/number.go b/number.go
index fc422af..e578ad3 100644
--- a/number.go
+++ b/number.go
@@ -42,6 +42,7 @@
 )
 
 // FormatFloat produces a formatted number as string based on the following user-specified criteria:
+//
 // * thousands separator
 // * decimal separator
 // * decimal precision