Fixed de-duplication of exception messages containing blank lines on Node and Chrome

This is particularly helpful when reporting testing-library errors, which
have messages that contain blank lines and can be hundreds or even thousands
of lines long.

lib/jasmine-core/jasmine.js

@@ -9889,9 +9889,7 @@ getJasmineRequireObj().SpyStrategy = function(j$) {
 
 getJasmineRequireObj().StackTrace = function(j$) {
   function StackTrace(error) {
-    let lines = error.stack.split('\n').filter(function(line) {
-      return line !== '';
-    });
+    let lines = error.stack.split('\n');
 
     const extractResult = extractMessage(error.message, lines);
 
@@ -9900,6 +9898,10 @@ getJasmineRequireObj().StackTrace = function(j$) {
       lines = extractResult.remainder;
     }
 
+    lines = lines.filter(function(line) {
+      return line !== '';
+    });
+
     const parseResult = tryParseFrames(lines);
     this.frames = parseResult.frames;
     this.style = parseResult.style;

spec/core/StackTraceSpec.js

@@ -51,6 +51,27 @@ describe('StackTrace', function() {
     ]);
   });
 
+  it('understands Chrome/Edge style traces with messages containing blank lines', function() {
+    const error = {
+      message: 'line 1\n\nline 2',
+      stack:
+        'Error: line 1\n\nline 2\n' +
+        '    at UserContext.<anonymous> (http://localhost:8888/__spec__/core/UtilSpec.js:115:19)\n' +
+        '    at QueueRunner.run (http://localhost:8888/__jasmine__/jasmine.js:4320:20)'
+    };
+
+    const result = new jasmineUnderTest.StackTrace(error);
+
+    expect(result.message).toEqual('Error: line 1\n\nline 2');
+    const rawFrames = result.frames.map(function(f) {
+      return f.raw;
+    });
+    expect(rawFrames).toEqual([
+      '    at UserContext.<anonymous> (http://localhost:8888/__spec__/core/UtilSpec.js:115:19)',
+      '    at QueueRunner.run (http://localhost:8888/__jasmine__/jasmine.js:4320:20)'
+    ]);
+  });
+
   it('understands Node style traces', function() {
     const error = {
       message: 'nope',

src/core/StackTrace.js

@@ -1,8 +1,6 @@
 getJasmineRequireObj().StackTrace = function(j$) {
   function StackTrace(error) {
-    let lines = error.stack.split('\n').filter(function(line) {
-      return line !== '';
-    });
+    let lines = error.stack.split('\n');
 
     const extractResult = extractMessage(error.message, lines);
 
@@ -11,6 +9,10 @@ getJasmineRequireObj().StackTrace = function(j$) {
       lines = extractResult.remainder;
     }
 
+    lines = lines.filter(function(line) {
+      return line !== '';
+    });
+
     const parseResult = tryParseFrames(lines);
     this.frames = parseResult.frames;
     this.style = parseResult.style;