Method dedent

crates/codegen/src/code_indenter.rs:40–42

(&mut self, n: u32)

        self.level = self.level.saturating_add(n);
    }
    pub fn dedent(&mut self, n: u32) {
        self.level = self.level.saturating_sub(n);
    }
    pub fn indented(&mut self, n: u32) -> IndentScope<'_, W> {
        self.indent(n);
        IndentScope { fmt: self }