Change case in Hello world!

[jane]

Currently, the "Hello world!" headline on the default post is in sentence case rather than title case, which would be "Hello World!"

Title case and sentence case are both grammatically correct, you just need to pick a standard and stick to it. But let's face it, headlines usually use title case. I propose that we change the default post title to use title case instead of sentence case.

[greenshady]

Whether one or both is correct would depend on your style guide. Since blogging is often synonymous with journalism, we should follow the convention of leaving "world" without an uppercase letter.

Another reason to follow this convention is that the title is a complete sentence with a closing punctuation mark.

If anything, I'd argue the text should be "Hello, world!"

[chriscct7]

The text both to be correct historically and for being correct titlecase should be "Hello, World!".

Updated patch attached that also changes "blogging" to "writing", more in line with CMS text, and "blog" to "website" for the same reason.

[obenland]

I like it.

[nacin]

I like some of these changes, but I think we should keep "blog post" in the page text. I also think we should keep "Hello world!" Not everyone uses title case for headlines. It's been like this forever, and is ubiquitous in that exact format on the internet thanks to WordPress. I don't think it should change at this point.

[nacin]

(@helen voiced general agreement on these.)

[nacin]

In 32768:

Tweak the first post/page content to get with the times.

props chriscct7.
fixes #22474.