docs: remove "$" from copied console line

[feisk]

For easy copying of the plugin installation command

This PR contains a:

• bugfix
• new feature
• code refactor
• test update
• typo fix
• metadata update

[codecov]

Codecov Report

Merging #578 (8bf0a0d) into master (46af20a) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #578   +/-   ##
=======================================
  Coverage   92.98%   92.98%           
=======================================
  Files           3        3           
  Lines         285      285           
  Branches       78       78           
=======================================
  Hits          265      265           
  Misses         20       20           

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[alexander-akait]

Why? We use it for any scripts to point what it is script

[feisk]

Why? We use it for any scripts to point what it is script

For consistency of webpack plugin descriptions

[alexander-akait]

can you provide example of others?

[feisk]

yes, for example here:
https://github.com/webpack-contrib/eslint-webpack-plugin
https://github.com/webpack-contrib/mini-css-extract-plugin

and here https://webpack.js.org/plugins/html-webpack-plugin/

When I want to quickly copy the line to install the plugin package, I copy the whole line, in this case it is much easier

[alexander-akait]

oh, yes, I see, thanks