fix: add camelCase ng-content selectors

[andrewseguin]

Adding selectors that should be used, will remove the other dash-cased versions in another PR

[jelbourn]

Actually list.md needs to be updated too

[andrewseguin]

Got it, changed the md

[jelbourn]

LGTM

[alexsapps]

lines 12-14 have to be on one line so the ".mat-list-text:empty" css selector works.

[alexsapps]

A little more context: The :empty selector is used to set display:none on the mat-list-text div so it doesn't take up space in the flexbox container leaving no room for anything else. The actual text seems to come after that div rather than inside it.

https://github.com/angular/material2/blob/5bc97ec89462a2dc11fdeccf69ee41eadc265bd4/src/lib/list/list.scss#L80
https://github.com/angular/material2/blob/dcc857664c9313694d020845135f1ce63a66f43a/src/lib/core/style/_list-common.scss#L46

[angular-automatic-lock-bot]

This issue has been automatically locked due to inactivity.
Please file a new issue if you are encountering a similar or related problem.

Read more about our automatic conversation locking policy.

_{This action has been performed automatically by a bot.}