Fix UnexpectedError renders correctly flake (#1865)

Author: scott-rc

spec/services/output/report.spec.ts

@@ -43,22 +43,19 @@ describe("UnexpectedError", () => {
     const cause = new Error("Whoops!");
 
     const error = new UnexpectedError(cause);
-    const rendered = error.sprint();
-
-    expect(rendered.replace(/at .*node_modules.*$/gm, "at ...")).toMatchInlineSnapshot(`
+    const rendered = error
+      .sprint()
+      // replace node_module stack lines with "at ..."
+      .replace(/at .*node_modules.*$/gm, "at ...")
+      // replace sequential "at ..." lines into a single line
+      .replace(/at \.\.\.(\n\s*at \.\.\.)+/g, "at ...");
+
+    expect(rendered).toMatchInlineSnapshot(`
       "An unexpected error occurred.
 
       Error: Whoops!
           at spec/services/output/report.spec.ts:43:19
           at ...
-          at ...
-          at ...
-          at ...
-          at ...
-          at ...
-          at ...
-          at ...
-          at ...
 
       This is a bug, use the link below to create an issue on GitHub.