weird error message when using option with single dash

[jnizet]

🐞 Bug report

Command (mark with an x)

all of them

Is this a regression?

I don't think so

Description

When passing an option with a single dash instead of two, the error message is weird and unhelpful. For example:

ng test -watch=false   
Unknown option: '-h'

I would expect something like:

ng test -watch=false   
Unknown option: '-watch'. Options start with two dashes. Did you mean '--watch'?

🌍 Your Environment

Angular CLI: 12.0.1
Node: 12.20.1
Package Manager: yarn 1.22.10
OS: darwin x64

Angular: 12.0.1
... animations, cdk, cli, common, compiler, compiler-cli, core
... forms, language-service, localize, platform-browser
... platform-browser-dynamic, router

Package                         Version
---------------------------------------------------------
@angular-devkit/architect       0.1200.1
@angular-devkit/build-angular   12.0.1
@angular-devkit/core            12.0.1
@angular-devkit/schematics      12.0.1
@schematics/angular             12.0.1
rxjs                            6.6.7
typescript                      4.2.4

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