Docs: Property binding and string initialization, small possible improvements

Description

In the property binding docs, there is a section about one-time string initialization which simply states that the square brackets for property binding are not to be used for simple strings defined in the template

as in:

   <app-string-init prefix="This is a one-time initialized string."></app-string-init>

instead of:

   <app-string-init [prefix]="'This is a one-time initialized string.'"></app-string-init>

and it says that this should be done (not could), so I was just thinking that this could be added to the property binding best practices page (something like “Avoid unnecessary expression evaluations”, which could refer to the section I mentioned on top of the issues’s description)

I’ve also found that a few places in the docs do not follow this, as for example:

So I would think it would be good to amend such docs/examples.

[gkalpak]

No worries, @dario-piotrowicz 😃

If some code is not used/needed, feel free to remove it. Let’s move the discussion to the PR 😉

[dario-piotrowicz]

Awesome, I’ll make the changes then, thanks 😃

( if I could be assigned to this issue that would be great 😃 )