Fix cargo dev update_lints

Now that lints can add @eval_always at the end of their definition, the lint
declaration might not end right after the description. The `update_lints`
command can skip everything that comes after that.

clippy_dev/src/update_lints.rs

@@ -762,13 +762,19 @@ fn parse_contents(contents: &str, module: &str, lints: &mut Vec<Lint>) {
             Literal{..}(desc)
         );
 
-        if let Some(LintDeclSearchResult {
+        if let Some(end) = iter.find_map(|t| {
+            if let LintDeclSearchResult {
                 token_kind: TokenKind::CloseBrace,
                 range,
                 ..
-        }) = iter.next()
+            } = t
             {
-            lints.push(Lint::new(name, group, desc, module, start..range.end));
+                Some(range.end)
+            } else {
+                None
+            }
+        }) {
+            lints.push(Lint::new(name, group, desc, module, start..end));
         }
     }
 }