Isse 25404. When remove a method during inlining, remove also leading empty lines.

pkg/analysis_server/lib/src/services/correction/strings.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library services.src.correction.strings;
 
 import 'dart:math';
 
 /**
  * "$"
@@ skipping 183 matching lines @@
 }
 
 bool isDigit(int c) {
   return c >= 0x30 && c <= 0x39;
 }
 
 bool isEmpty(String str) {
   return str == null || str.isEmpty;
 }
 
+bool isEOL(int c) {
+  return c == 0x0D || c == 0x0A;
+}
+
 bool isLetter(int c) {
   return (c >= 0x41 && c <= 0x5A) || (c >= 0x61 && c <= 0x7A);
 }
 
 bool isLetterOrDigit(int c) {
   return isLetter(c) || isDigit(c);
 }
 
 bool isLowerCase(int c) {
   return c >= 0x61 && c <= 0x7A;
 }
 
 bool isSpace(int c) => c == 0x20 || c == 0x09;
 
 bool isUpperCase(int c) {
   return c >= 0x41 && c <= 0x5A;
 }
 
 bool isWhitespace(int c) {
-  return isSpace(c) || c == 0x0D || c == 0x0A;
+  return isSpace(c) || isEOL(c);
 }
 
 String remove(String str, String remove) {
   if (isEmpty(str) || isEmpty(remove)) {
     return str;
   }
   return str.replaceAll(remove, '');
 }
 
 String removeEnd(String str, String remove) {
@@ skipping 34 matching lines @@
   }
   if (isEmpty(separator)) {
     return '';
   }
   int pos = str.lastIndexOf(separator);
   if (pos == -1) {
     return str;
   }
   return str.substring(pos + separator.length);
 }