Fix warning for running docs by Eleventy

[HyunSangHan]

I was trying to build docs, I found the alert messages which are Language does not exist sh and Language does not exist text. When I use npm start docs, the alert messages come because of eleventy like below :

Hyunsangs-MacBookAir:mocha temp$ npm start docs

> mocha@6.2.0 start /Users/temp/Downloads/exercise/mocha
> nps "docs"

nps is executing `docs` : nps docs.prebuild && nps docs.api && eleventy && nps docs.linkcheck && nps docs.postbuild
nps is executing `docs.prebuild` : rimraf docs/_dist docs/_site && nps docs.preprocess
nps is executing `docs.preprocess` : md-magic --config ./scripts/markdown-magic.config.js --path docs/index.md
Starting markdown-magic docs/index.md
✔ docs/index.md Updated
 Transforms run
  ⁕ usage:executable=bin/mocha
  ⁕ toc:maxdepth=2&bullets=-
  ⁕ manifest:template=[gitter]: ${gitter}

Files processed. markdown-magic Finished! ⊂◉‿◉つ
nps is executing `docs.api` : nps docs.preprocess.api && jsdoc -c jsdoc.conf.json
nps is executing `docs.preprocess.api` : md-magic --config ./scripts/markdown-magic.config.js --path "docs/api-tutorials/*.md"
Starting markdown-magic docs/api-tutorials/*.md
✔ docs/api-tutorials/custom-reporter.md Updated
 Transforms run
  ⁕ file:src=../../test/integration/fixtures/simple-reporter.js&header=// my-reporter.js

Files processed. markdown-magic Finished! ⊂◉‿◉つ
Parsing /Users/temp/Downloads/exercise/mocha/lib/browser/growl.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/browser/progress.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/browser/tty.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/cli/cli.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/cli/collect-files.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/cli/commands.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/cli/config.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/cli/index.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/cli/init.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/cli/node-flags.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/cli/one-and-dones.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/cli/options.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/cli/run-helpers.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/cli/run-option-metadata.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/cli/run.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/cli/watch-run.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/context.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/errors.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/growl.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/hook.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/interfaces/bdd.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/interfaces/common.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/interfaces/exports.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/interfaces/index.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/interfaces/qunit.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/interfaces/tdd.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/mocha.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/pending.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/reporters/base.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/reporters/doc.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/reporters/dot.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/reporters/html.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/reporters/index.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/reporters/json-stream.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/reporters/json.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/reporters/landing.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/reporters/list.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/reporters/markdown.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/reporters/min.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/reporters/nyan.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/reporters/progress.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/reporters/spec.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/reporters/tap.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/reporters/xunit.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/runnable.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/runner.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/stats-collector.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/suite.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/test.js ...
Parsing /Users/temp/Downloads/exercise/mocha/lib/utils.js ...
Generating output files...
Finished running in 2.07 seconds.
Language does not exist sh
Language does not exist sh
Language does not exist sh
Language does not exist sh
Language does not exist sh
Language does not exist sh
Language does not exist sh
Language does not exist text
Language does not exist sh
Language does not exist sh
Language does not exist sh
Language does not exist sh
Language does not exist sh
Language does not exist sh

Description of the Change

It is the problem of code fences (triple backticks) for highlight.
Eleventy is using https://github.com/11ty/eleventy-plugin-syntaxhighlight for syntax highlight, which is utilising Prism(The supported languages are https://prismjs.com/#languages-list). That's why Eleventy doesn't take sh or text for highlight, but in docs/index.md, it is used sh(13 times), and text(1 time).
By using bash instead of sh, the alert messages for bash are gone.

• NOTE : Because there was no word to substitute for text that ESLint allows, I didn't change it. I tried bash and shell to replace text, but it does not that look good when it is served on the browser. So, there is still one-line alert message that is Language does not exist text.

[coveralls]

Coverage increased (+0.07%) to 92.761% when pulling 3f2831a on HyunSangHan:docs-code-block into ec17f63 on mochajs:master.

[outsideris]

I haven't known why Language does not exist messages are showed.

Thank you.

[boneskull]

Thanks! LGTM