Fix clippy_lints doc-tests

Author: mati865

clippy_lints/src/needless_continue.rs

@@ -2,7 +2,7 @@
 //!
 //! For example, the lint would catch
 //!
-//! ```
+//! ```ignore
 //! while condition() {
 //!     update_condition();
 //!     if x {
@@ -16,7 +16,7 @@
 //!
 //! And suggest something like this:
 //!
-//! ```
+//! ```ignore
 //! while condition() {
 //!     update_condition();
 //!     if x {
@@ -365,7 +365,7 @@ fn check_and_warn<'a>(ctx: &EarlyContext, expr: &'a ast::Expr) {
 ///
 /// is transformed to
 ///
-/// ```
+/// ```ignore
 ///     {
 ///         let x = 5;
 /// ```
@@ -388,7 +388,7 @@ pub fn erode_from_back(s: &str) -> String {
 /// any number of opening braces are eaten, followed by any number of newlines.
 /// e.g.,  the string
 ///
-/// ```
+/// ```ignore
 ///         {
 ///             something();
 ///             inside_a_block();
@@ -397,7 +397,7 @@ pub fn erode_from_back(s: &str) -> String {
 ///
 /// is transformed to
 ///
-/// ```
+/// ```ignore
 ///             something();
 ///             inside_a_block();
 ///         }

clippy_lints/src/question_mark.rs

@@ -43,7 +43,7 @@ impl LintPass for QuestionMarkPass {
 impl QuestionMarkPass {
     /// Check if the given expression on the given context matches the following structure:
     ///
-    /// ```
+    /// ```ignore
     /// if option.is_none() {
     ///    return None;
     /// }

clippy_lints/src/utils/mod.rs

@@ -612,7 +612,7 @@ pub fn span_lint_and_then<'a, 'tcx: 'a, T: LintContext<'tcx>, F>(
 /// These suggestions can be parsed by rustfix to allow it to automatically fix your code.
 /// In the example below, `help` is `"try"` and `sugg` is the suggested replacement `".any(|x| x > 2)"`.
 ///
-/// ```
+/// ```ignore
 /// error: This `.fold` can be more succinctly expressed as `.any`
 /// --> $DIR/methods.rs:390:13
 ///     |