Use stdout when requested to print the configuration

CHANGELOG.md

@@ -5,6 +5,7 @@
 - `[jest-config]` Add missing options to the `defaults` object ([#6428](https://github.com/facebook/jest/pull/6428))
 - `[expect]` Using symbolic property names in arrays no longer causes the `toEqual` matcher to fail ([#6391](https://github.com/facebook/jest/pull/6391))
 - `[expect]` `toEqual` no longer tries to compare non-enumerable symbolic properties, to be consistent with non-symbolic properties. ([#6398](https://github.com/facebook/jest/pull/6398))
+- `[jest-cli]` Write configuration to stdout when the option was explicitly passed to Jest ([#6447](https://github.com/facebook/jest/pull/6447))
 
 ### Chore & Maintenance
 

packages/jest-cli/src/cli/index.js

@@ -198,10 +198,13 @@ const printDebugInfoAndExitIfNeeded = (
   configs,
   outputStream,
 ) => {
-  if (argv.debug || argv.showConfig) {
+  if (argv.debug) {
     logDebugMessages(globalConfig, configs, outputStream);
+    return;
   }
+
   if (argv.showConfig) {
+    logDebugMessages(globalConfig, configs, process.stdout);
     exit(0);
   }
 };