def leading_indent
import cli@0.2.0.0/cli.bend as Cliimport Base
1007def leading_indent(s: String) -> String:
1008 match s:
1009 case SNil{}:
1010 ""
1011 case SCon{+head, tail}:
1012 Bool.pick(String, Char.is_eq(head, ' '),
1013 SCon{head, leading_indent(tail)}, "")