Remove jasmine.js lines from displayed stack trace

This removes the noise from the setup and compare lines that occur in
jasmine.js and only displays the lines that are generated from within
the failing spec.

spec/atom-reporter.coffee

@@ -166,13 +166,26 @@ class SpecResultView extends View
     @description.html @spec.description
 
     for result in @spec.results().getItems() when not result.passed()
+      stackTrace = @formatStackTrace(result.trace.stack)
       @specFailures.append $$ ->
         @div result.message, class: 'resultMessage fail'
-        @div result.trace.stack, class: 'stackTrace' if result.trace.stack
+        @div stackTrace, class: 'stackTrace' if stackTrace
 
   attach: ->
     @parentSuiteView().append this
 
+  formatStackTrace: (stackTrace) ->
+    return stackTrace unless stackTrace
+
+    jasminePath = require.resolve('jasmine')
+    jasminePattern = new RegExp("\\(#{_.escapeRegExp(jasminePath)}:\\d+:\\d+\\)\\s*$")
+    convertedLines = []
+    for line in stackTrace.split('\n')
+      unless jasminePattern.test(line)
+        convertedLines.push(line)
+
+    convertedLines.join('\n')
+
   parentSuiteView: ->
     if not suiteView = $(".suite-view-#{@spec.suite.id}").view()
       suiteView = new SuiteResultView(@spec.suite)