* Simplify logic around generated article description
@citizen428 helpfully pointed out ActiveSupport's String#truncate
method, and I had read the processed_description method body
immediately before and knew it could benefit from using truncate.
When the body text is present, if it's long, truncate to 100
characters (with trailing ellipsis as needed), removing newlines.
When the body text is absent, populate with a generic "post by user"
message.
* Change magic description length to match the original behavior
Since we were previously slicing [0..100] we would get 101 characters, and then
appending three dots makes for 104 total.
There is a longish description passed in the articles api request test
that shows "part of the body as a description" that failed to match
with the first pass.
18a2a98b7a