Fix minor formatting problem

Author: waynr

clippy_lints/src/methods/mod.rs

@@ -313,7 +313,7 @@ declare_clippy_lint! {
 ///
 /// let correct: Vec<String> = ws.iter()
 ///     .filter_map(|s| if s.contains("izzle"){
-///     Some(s)
+///       Some(s)
 ///     } else {
 ///       None
 ///     })
@@ -322,7 +322,7 @@ declare_clippy_lint! {
 ///
 /// let more_correct: Vec<String> = ws.iter()
 ///     .filter_map(|s| if s.contains("izzle"){
-///     Some(format!("{}{}", s, s))
+///       Some(format!("{}{}", s, s))
 ///     } else {
 ///       None
 ///     })