As suggested by fixer1234 in the comments here, it appears that the original answerer wanted to make a direct quotation of his source without editing or improving it at all. I for one can see the value of improving on content we pull from external sources, and just leaving the external source there as a place for folks to go if they want to see the original (for authenticity, for example).

But I suppose it's fine if he doesn't want to deviate from what the horse's mouth said. While I think your edit improves the formatting of the content and makes it easier to understand, it fundamentally breaks the "direct quotation" style of the original answer.

Even though I advocate editing whenever it improves an answer, I think, in this case, it's up to the original answerer if they want to keep a direct quotation style in their answer rather than trying to improve it. If you were just cleaning up text that the original answerer had written themselves, I'd see less grounds to reject your edit.

<rant>

As can probably be inferred from my profile, I am of the opinion that most users are overpossessive of "their" answers. In my opinion, edits are (supposed to be) such a big part of the site because the intent is to eliminate poorly-formatted or even incorrect content by improving it; we're sorta like Wikipedia in that sense.

Our dedication to edits goes so far that, after you get a certain amount of reputation, you can unilaterally make an edit anywhere you want on the site -- you just click "edit", type what you want, click save, and bam -- your changes are live on the site.

Instead, in forum-like fashion, most users stake out their answer and go, "Mine! Hands off!" and aggressively reject anyone trying to encroach on their little fiefdoms, paying no mind to what future visitors to the site might experience. All that matters is that their original content is preserved intact.

Have you ever been a consumer of the content on one of the Stack Exchange sites? Whether it was Super User, Stack Overflow or some other site? Okay... so did you ever read a question that was relevant to you, but had, say, more than 3 answers?

Did you ever feel that a lot of information was being repeated multiple times in each answer, but with each poster's take on it in their own words? And then each post has its own typos; its own formatting imperfections; maybe even its own factual inaccuracies.

Sound familiar?

Anyway, this screed is just to say, that's kind of where the culture of the site is (and has been for a while). I don't think it's optimal, and I'm sure later visitors find it annoying to search through multiple similar answers and pick out the grains of truth from between the teeth of half-truths, outdated information, and lovely data evidently typed by someone who doesn't know Markdown from magic marker.

The de facto policy is, generally speaking, don't edit others' answers (like, at all). Instead, if you want to contribute to the discussion, post your own, competing answer, and let ---God--- votes sort out whose answer is better.

</rant>

As suggested by fixer1234 in the comments here, it appears that the original answerer wanted to make a direct quotation of his source without editing or improving it at all. I for one can see the value of improving on content we pull from external sources, and just leaving the external source there as a place for folks to go if they want to see the original (for authenticity, for example).

But I suppose it's fine if he doesn't want to deviate from what the horse's mouth said. While I think your edit improves the formatting of the content and makes it easier to understand, it fundamentally breaks the "direct quotation" style of the original answer.

Even though I advocate editing whenever it improves an answer, I think, in this case, it's up to the original answerer if they want to keep a direct quotation style in their answer rather than trying to improve it. If you were just cleaning up text that the original answerer had written themselves, I'd see less grounds to reject your edit.

<rant>

As can probably be inferred from my profile, I am of the opinion that most users are overpossessive of "their" answers. In my opinion, edits are (supposed to be) such a big part of the site because the intent is to eliminate poorly-formatted or even incorrect content by improving it; we're sorta like Wikipedia in that sense.

Our dedication to edits goes so far that, after you get a certain amount of reputation, you can unilaterally make an edit anywhere you want on the site -- you just click "edit", type what you want, click save, and bam -- your changes are live on the site.

Instead, in forum-like fashion, most users stake out their answer and go, "Mine! Hands off!" and aggressively reject anyone trying to encroach on their little fiefdoms, paying no mind to what future visitors to the site might experience. All that matters is that their original content is preserved intact.

Have you ever been a consumer of the content on one of the Stack Exchange sites? Whether it was Super User, Stack Overflow or some other site? Okay... so did you ever read a question that was relevant to you, but had, say, more than 3 answers?

Did you ever feel that a lot of information was being repeated multiple times in each answer, but with each poster's take on it in their own words? And then each post has its own typos; its own formatting imperfections; maybe even its own factual inaccuracies.

Sound familiar?

Anyway, this screed is just to say, that's kind of where the culture of the site is (and has been for a while). I don't think it's optimal, and I'm sure later visitors find it annoying to search through multiple similar answers and pick out the grains of truth from between the teeth of half-truths, outdated information, and lovely data evidently typed by someone who doesn't know Markdown from magic marker.

The de facto policy is, generally speaking, don't edit others' answers (like, at all). Instead, if you want to contribute to the discussion, post your own, competing answer, and let God votes sort out whose answer is better.

</rant>