string difference not visible due to "elided lines"

Sometimes I get output where the relevant difference between two strings is not shown because one or both get truncated with `elided lines`. Example:

```
-  SystemErr: Inverse(simplify, string(
-  """
-  > Enter [BeforeEach] e2e - cleanup_test.go:54
-  INFO: before
-  < Exit [BeforeEach] e2e - cleanup_test.go:54
-  > Enter [BeforeEach] e2e - set up framework | framework.go:xxx
-  STEP: Creating a kubernetes client - framework.go:xxx
-  INFO: >>> kubeConfig: yyy/kube.config
-  STEP: Building a namespace api object, basename test-namespace - framework.go:xxx
-  INFO: Skipping waiting for service account
-  < Exit [BeforeEach] e2e - set up framework | framework.go:xxx
-  > Enter [BeforeEach] e2e - cleanup_test.go:98
-  INFO: extension before
-  < Exit [BeforeEach] e2e - cleanup_test.go:98
-  > Enter [BeforeEach] e2e - cleanup_test.go:62
-  INFO: before #1
-  < Exit [BeforeEach] e2e - cleanup_test.go:62
-  > Enter [BeforeEach] e2e - cleanup_test.go:66
-  INFO: before #2
-  < Exit [BeforeEach] e2e - cleanup_test.go:66
-  > Enter [It] works - cleanup_test.go:81
-  [FAILED] failure
-  In [It] at: cleanup_test.go:90
-  < Exit [It] works - cleanup_test.go:81
-  > Enter [AfterEach] e2e - cleanup_test.go:99
-  INFO: extension after
-  < Exit [AfterEach] e2e - cleanup_test.go:99
-  > Enter [AfterEach] e2e - cleanup_test.go:70
-  INFO: after #1
-  < Exit [AfterEach] e2e - cleanup_test.go:70
-  > Enter [AfterEach] e2e - cleanup_test.go:77
-  INFO: after #2
-  < Exit [AfterEach] e2e - cleanup_test.go:77
-  """
-  )),
+  SystemErr: Inverse(simplify, string(
+  """
+  > Enter [BeforeEach] e2e - cleanup_test.go:54
+  INFO: before
+  < Exit [BeforeEach] e2e - cleanup_test.go:54
+  > Enter [BeforeEach] e2e - set up framework | framework.go:xxx
+  STEP: Creating a kubernetes client - framework.go:xxx
+  INFO: >>> kubeConfig: yyy/kube.config
+  STEP: Building a namespace api object, basename test-namespace - framework.go:xxx
+  INFO: Skipping waiting for service account
+  < Exit [BeforeEach] e2e - set up framework | framework.go:xxx
+  > Enter [BeforeEach] e2e - cleanup_test.go:98
+  INFO: extension before
+  < Exit [BeforeEach] e2e - cleanup_test.go:98
+  > Enter [BeforeEach] e2e - cleanup_test.go:62
+  INFO: before #1
+  < Exit [BeforeEach] e2e - cleanup_test.go:62
+  > Enter [BeforeEach] e2e - cleanup_test.go:66
+  INFO: before #2
+  < Exit [BeforeEach] e2e - cleanup_test.go:66
+  > Enter [It] works - cleanup_test.go:81
+  [FAILED] failure
+  In [It] at: cleanup_test.go:90
+  < Exit [It] works - cleanup_test.go:81
+  > Enter [AfterEach] e2e - cleanup_test.go:99
+  INFO: extension after
+  < Exit [AfterEach] e2e - cleanup_test.go:99
+  > Enter [AfterEach] e2e - cleanup_test.go:70
+  INFO: after #1
+  < Exit [AfterEach] e2e - cleanup_test.go:70
+  > Enter [AfterEach] e2e - cleanup_test.go:77
+  INFO: after #2
+  < Exit [AfterEach] e2e - cleanup_test.go:77
+  ... // 27 elided lines
+  """
+  )),
```

In this example, I started with the expected string set to empty, copied as much of the actual string as possible, and then repeated. But because not all of it was shown, I am missing some lines. I was hoping to get a diff with the missing lines, but the heuristics apparently decided to just show both strings.

The simplify function does some string->string replacement to get rid of some line numbers and time stamps.

It's not entirely clear to me why this happens. I tried to reproduce it with exactly these strings and without a transformer, but then it worked as expected (showed a diff). I also tried with a transformer, with the same result.