visitor: A few file lines fixes

src/utils.rs

@@ -343,6 +343,7 @@ macro_rules! skip_out_of_file_lines_range {
 macro_rules! skip_out_of_file_lines_range_visitor {
     ($self:ident, $span:expr) => {
         if out_of_file_lines_range!($self, $span) {
+            $self.push_rewrite($span, None);
             return;
         }
     }

src/visitor.rs

@@ -661,7 +661,19 @@ impl<'a> FmtVisitor<'a> {
                     })
                     .count();
                 let (use_items, rest) = items_left.split_at(use_item_length);
-                self.format_imports(use_items);
+
+                let at_least_one_in_file_lines = use_items
+                    .iter()
+                    .any(|item| !out_of_file_lines_range!(self, item.span));
+
+                if at_least_one_in_file_lines {
+                    self.format_imports(use_items);
+                } else {
+                    for item in use_items {
+                        self.push_rewrite(item.span, None);
+                    }
+                }
+
                 items_left = rest;
             } else {
                 // `unwrap()` is safe here because we know `items_left`

tests/source/file-lines-item.rs

@@ -1,6 +1,8 @@
-// rustfmt-file_lines: [{"file":"tests/source/file-lines-item.rs","range":[5,7]}]
+// rustfmt-file_lines: [{"file":"tests/source/file-lines-item.rs","range":[7,9]}]
+// rustfmt-reorder_imports: true
 
 use foo::{c, b, a};
+use bar;
 
 fn foo() {
     bar ( ) ;
@@ -10,3 +12,11 @@ impl Drop for Context {
      fn drop(&mut self) {
     }
 }
+
+impl Bar for Baz {
+    fn foo() {
+        bar(
+            baz, // Who knows?
+        )
+    }
+}

tests/target/file-lines-item.rs

@@ -1,6 +1,8 @@
-// rustfmt-file_lines: [{"file":"tests/source/file-lines-item.rs","range":[5,7]}]
+// rustfmt-file_lines: [{"file":"tests/source/file-lines-item.rs","range":[7,9]}]
+// rustfmt-reorder_imports: true
 
 use foo::{c, b, a};
+use bar;
 
 fn foo() {
     bar();
@@ -10,3 +12,11 @@ impl Drop for Context {
      fn drop(&mut self) {
     }
 }
+
+impl Bar for Baz {
+    fn foo() {
+        bar(
+            baz, // Who knows?
+        )
+    }
+}