Only span notes if snippet is not multiline

Author: andrehjr

clippy_lints/src/methods/mod.rs

@@ -1965,14 +1965,18 @@ fn lint_filter_map_next<'a, 'tcx>(cx: &LateContext<'a, 'tcx>, expr: &'tcx hir::E
         let msg = "called `filter_map(p).next()` on an `Iterator`. This is more succinctly expressed by calling \
                    `.find_map(p)` instead.";
         let filter_snippet = snippet(cx, filter_args[1].span, "..");
-        span_note_and_lint(
-            cx,
-            FILTER_MAP_NEXT,
-            expr.span,
-            msg,
-            expr.span,
-            &format!("replace `filter_map({0}).next()` with `find_map({0})`", filter_snippet),
-        );
+        if filter_snippet.lines().count() <= 1 {
+            span_note_and_lint(
+                cx,
+                FILTER_MAP_NEXT,
+                expr.span,
+                msg,
+                expr.span,
+                &format!("replace `filter_map({0}).next()` with `find_map({0})`", filter_snippet),
+            );
+        } else {
+            span_lint(cx, FILTER_MAP_NEXT, expr.span, msg);
+        }
     }
 }
 

tests/ui/filter_map_next.stderr

@@ -19,20 +19,6 @@ LL | |             if x == 2 {
 LL | |         })
 LL | |         .next();
    | |_______________^
-   |
-   = note: replace `filter_map(|x| {
-                       if x == 2 {
-                           Some(x * 2)
-                       } else {
-                           None
-                       }
-                   }).next()` with `find_map(|x| {
-                       if x == 2 {
-                           Some(x * 2)
-                       } else {
-                           None
-                       }
-                   })`
 
 error: aborting due to 2 previous errors