Add missing centered CSS class

[GuillaumeGomez]

Fixes cases like this (content is completely on the left, leaving big "empty space" on the right):

As a reminder, #1698 is still waiting for feedback to prevent regressions like this to happen. ;)

[Nemo157]

These pages being left-aligned was an explicit change #2012

[GuillaumeGomez]

Even the search results and the non "main" crate pages?

[Nemo157]

The docs.rs crate pages, yes that was definitely called out in the PR, and the search page is one of the "release pages".

[Nemo157]

(Pages that looks like they could do with a bit of style work to make left-alignment look better are https://docs.rs/crate/serde/1.0.152/builds and https://docs.rs/crate/serde/1.0.152/builds/709459, those are the only ones without a left-sidebar).

[GuillaumeGomez]

Okay, gonna update the PR then.

[GuillaumeGomez]

Put back the left align like mentioned.

[Nemo157]

cc @jsha since you have more context on what the overall plan of left aligning was.

[jsha]

This looks good to me. The idea with left-aligning is that the rustdoc pages themselves are left-aligned, and the crate pages are related to them, so it's jarring to go back and forth between left-aligned and right-aligned.

For the homepage and various pages that show search results, it's reasonable to be centered, IMO.

In this PR, builds and build_details should ideally be left-aligned, but given that their layout is currently messed up when left-aligned I'm fine landing this as a quick fix. We should later follow up and left-align them with appropriate padding.

[GuillaumeGomez]

Ok, merging then. Thanks for the feedback!