Fix a formatting bug

src/how.rs

@@ -145,7 +145,7 @@ impl std::fmt::Display for How {
             if i != 0 {
                 f.write_str("\n")?;
             }
-            report_write!(f, &opts.indent(), "- {ctx}")?;
+            report_write!(f, &opts.indent().next(), "{ctx}")?;
         }
         Ok(())
     }