message: Add help for configuration of collectCoverageFrom
diff: @@ -153,6 +153,24 @@ This will collect coverage information for all the files inside the project's `r
  _Note: This option requires `collectCoverage` to be set to true or Jest to be invoked with `--coverage`._
  +<details>
  + <summary>Help:</summary>
  + If you are seeing coverage output such as...
  +
  +```
  +=============================== Coverage summary ===============================
  +Statements : Unknown% ( 0/0 )
  +Branches : Unknown% ( 0/0 )
  +Functions : Unknown% ( 0/0 )
  +Lines : Unknown% ( 0/0 )
  +================================================================================
  +Jest: Coverage data for global was not found.
  +```
  +
  +Most likely your glob patterns are not matching any files. Refer to the [micromatch](https://github.com/jonschlinkert/micromatch) documentation to ensure your globs are compatible.
  +
  +</details>
  +
  ### `coverageDirectory` [string]
  Default: `undefined`
  