Only strip the first tab from the output

go-junit-report_test.go

@@ -59,8 +59,8 @@ var testCases []TestCase = []TestCase{
 							Output: []string{
 								"file_test.go:11: Error message",
 								"file_test.go:11: Longer",
-								"error",
-								"message.",
+								"\terror",
+								"\tmessage.",
 							},
 						},
 						{
@@ -130,7 +130,7 @@ func TestParser(t *testing.T) {
 				testOutput := strings.Join(test.Output, "\n")
 				expTestOutput := strings.Join(expTest.Output, "\n")
 				if testOutput != expTestOutput {
-					t.Errorf("Test.Output ==\n%s, want\n%s", testOutput, expTestOutput)
+					t.Errorf("Test.Output ==\n%s\n, want\n%s", testOutput, expTestOutput)
 				}
 			}
 		}

parser.go

@@ -97,7 +97,7 @@ func Parse(r io.Reader) (*Report, error) {
 				test.Time = parseTime(matches[3]) * 10
 			} else if strings.HasPrefix(line, "\t") {
 				// test output
-				test.Output = append(test.Output, strings.TrimLeft(line, "\t"))
+				test.Output = append(test.Output, line[1:])
 			}
 		}
 	}

tests/02-report.xml

@@ -6,8 +6,8 @@
 	<testcase classname="name" name="TestOne" time="0.020">
 		<failure message="Failed" type="">file_test.go:11: Error message
 file_test.go:11: Longer
-error
-message.</failure>
+	error
+	message.</failure>
 	</testcase>
 	<testcase classname="name" name="TestTwo" time="0.130"></testcase>
 </testsuite>