refactor: modernize using min()

internal/templates/template_test.go

@@ -32,10 +32,7 @@ func templateFuncMap() template.FuncMap {
 			if start >= len(s) {
 				return ""
 			}
-			end := start + length
+			end := min(start+length, len(s))
-			if end > len(s) {
-				end = len(s)
-			}
 			return s[start:end]
 		},
 		"upper": strings.ToUpper,