Discard first line of multiline string if only whitespace

tests/co19/co19-runtime.status

 # Copyright (c) 2012, 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.
 
 [ $runtime == vm ]
 Language/12_Expressions/01_Constants_A16_t04: fail # Issue 392
 Language/12_Expressions/01_Constants_A16_t05: fail # Issue 392
 
 [ $runtime == vm && $system == windows ]
 LibTest/core/Stopwatch/elapsed_A01_t01: Pass, Fail # Issue 11382.
@@ skipping 54 matching lines @@
 Language/05_Variables/05_Variables_A06_t01: fail # Dart issue 12543
 Language/05_Variables/05_Variables_A06_t02: fail # Dart issue 12543
 Language/05_Variables/05_Variables_A06_t03: fail # Dart issue 12543
 Language/05_Variables/05_Variables_A06_t04: fail # Dart issue 12543
 Language/05_Variables/05_Variables_A06_t05: fail # Dart issue 12543
 Language/05_Variables/05_Variables_A06_t06: fail # Dart issue 12543
 Language/05_Variables/05_Variables_A16_t02: fail # Dart issue 12544
 Language/07_Classes/6_Constructors/1_Generative_Constructors_A09_t01: fail # Dart issue 12543
 Language/12_Expressions/05_Strings_A02_t46: fail # Dart issue 12547
 Language/12_Expressions/05_Strings_A02_t48: fail # Dart issue 12547
-Language/12_Expressions/05_Strings_A20_t01: fail # Dart issue 12518
 Language/12_Expressions/12_Instance_Creation/1_New_A06_t12: fail # Dart issue 12549
 Language/12_Expressions/12_Instance_Creation/1_New_A09_t09: fail # Dart issue 1372
 Language/12_Expressions/12_Instance_Creation/2_Const_A10_t01: fail # co19 issue 525
 Language/12_Expressions/14_Function_Invocation/4_Function_Expression_Invocation_A05_t01: fail # Dart issue 12550
 Language/12_Expressions/15_Method_Invocation/3_Static_Invocation_A04_t09: fail # Dart issue 12549
 Language/12_Expressions/30_Identifier_Reference_A08_t02: fail # Dart issue 12593
 Language/12_Expressions/32_Type_Test_A04_t02: fail # co19 issue 503
 Language/12_Expressions/32_Type_Test_A04_t03: fail # co19 issue 534
 Language/12_Expressions/32_Type_Test_A04_t04: fail # co19 issue 534
 Language/12_Expressions/33_Type_Cast_A03_t02: fail # co19 issue 534
 Language/12_Expressions/33_Type_Cast_A03_t03: fail # co19 issue 534
 Language/13_Statements/03_Variable_Declaration_A04_t07: fail # co19 issue 535
 Language/13_Statements/03_Variable_Declaration_A04_t08: fail # co19 issue 535
 Language/13_Statements/06_For_A01_t11: fail # Dart issue 5675
 Language/13_Statements/09_Switch_A01_t02: fail # Dart issue 12908
 Language/13_Statements/09_Switch_A02_t02: fail # Dart issue 7307
 Language/13_Statements/09_Switch_A03_t01: fail # Dart issue 7307
 Language/13_Statements/09_Switch_A03_t02: fail # Dart issue 7307
 Language/13_Statements/09_Switch_A04_t01: fail # Dart issue 11233
 Language/13_Statements/12_Labels_A01_t03: fail # Dart issue 2238
 Language/14_Libraries_and_Scripts/1_Imports_A03_t27: fail # Dart issue 12915
 Language/14_Libraries_and_Scripts/2_Exports_A04_t02: fail # Dart issue 12916
 Language/14_Libraries_and_Scripts/2_Exports_A04_t03: fail # Dart issue 12916
 Language/14_Libraries_and_Scripts/2_Exports_A05_t01: fail # Dart issue 12918
-Language/14_Libraries_and_Scripts/5_URIs_A01_t01: fail # Issue 12521
 Language/14_Libraries_and_Scripts/5_URIs_A01_t04: fail # Issue 12521
 Language/14_Libraries_and_Scripts/5_URIs_A01_t05: fail # Issue 12521
-Language/14_Libraries_and_Scripts/5_URIs_A01_t11: fail # Issue 12521
 Language/14_Libraries_and_Scripts/5_URIs_A01_t14: fail # Issue 12521
 Language/14_Libraries_and_Scripts/5_URIs_A01_t15: fail # Issue 12521
-Language/14_Libraries_and_Scripts/5_URIs_A01_t21: fail # Issue 12518
 
 LibTest/core/DateTime/parse_A03_t01: fail # Issue 12514
 
 # All isolate are being ignored at the moment as the library will go through some changes.
 LibTest/isolate/IsolateSink/addError_A01_t01: fail # co19-roll r546: Please triage this failure
 LibTest/isolate/IsolateSink/addError_A01_t02: fail # co19-roll r546: Please triage this failure
 LibTest/isolate/IsolateStream/any_A02_t01: fail # co19-roll r546: Please triage this failure
 LibTest/isolate/IsolateStream/contains_A02_t01: fail, pass # co19-roll r546: Please triage this failure
 LibTest/isolate/SendPort/send_A01_t01: fail # co19-roll r546: Please triage this failure
 LibTest/isolate/ReceivePort/receive_A01_t02: Fail # VM triage, check spec.
@@ skipping 35 matching lines @@
 [ $compiler == none && $runtime == vm ]
 LibTest/typed_data/Float32x4/clamp_A01_t01: Pass, Fail # Issue 13543
 LibTest/typed_data/Float32x4/clamp_A02_t01: Pass, Fail # Issue 13543
 LibTest/typed_data/Float32x4/reciprocalSqrt_A01_t01: Pass, Fail # Issue 13543
 LibTest/typed_data/Float32x4/reciprocal_A01_t01: Pass, Fail # Issue 13543
 LibTest/typed_data/Float32x4/toUint32x4_A01_t01: Fail # co19 Issue 601
 LibTest/typed_data/Float32x4/toUint32x4_A01_t02: Fail # co19 Issue 601
 LibTest/typed_data/Uint32x4/toFloat32x4_A01_t01: Fail # co19 Issue 601
 LibTest/typed_data/Uint32x4/toFloat32x4_A01_t02: Fail # co19 Issue 601