Join strings with space rather than newline

Author: KashifSaadat

main.go

@@ -348,7 +348,7 @@ func isLocalType(t *types.Type, typePkgMap map[*types.Type]*apiPackage) bool {
 
 func renderComments(s []string, markdown bool) string {
 	s = filterCommentTags(s)
-	doc := strings.Join(s, "\n")
+	doc := strings.Join(s, " ")
 
 	if markdown {
 		// TODO(ahmetb): when a comment includes stuff like "http://<service>"