Remove mid-paragraph line breaks from 2-building-a-list-of-pages.md markdown

[adamziel]

What?

Removes the line breaks from the markdown tutorial. They don't look good when rendered to HTML in the handbook:

Testing Instructions

I don't think there's a way to test this. Just eyeball this PR and confirm it makes sense.

cc @atachibana @scruffian @getdave @dmsnell

[dmsnell]

Looks like something is wrong with our Markdown renderer else it's adopted non-standard behavior, as manual single line breaks (to my knowledge) should not introduce breaks in the output. The result should be identical before and after this change.

It appears like GitHub does this as well, which might have influenced other renderers to adopt it. New lines should be indicated by ending a line with a couple of space characters and then a newline. This is/was (I think) to keep it reasonable to edit Markdown documents in editors without soft-wrapping.

I guess it's fine to address this by removing the newlines, but that also seems like it is changing code to workaround a bug. I'm curious how prevalent this situation is in the docs.