Comparing these two:
<https://en.wikipedia.org/w/index.php?title=Ted_Nelson&type=revision&diff=842034627&oldid=832139178&diffmode=visual>
<https://en.wikipedia.org/w/index.php?title=Ted_Nelson&type=revision&diff=842034627&oldid=832139178&diffmode=source>
The source diff shows 4 rough areas that were changed, with the last modified paragraph being:
```lang=diff
- Nelson co-founded "itty bitty machine company", or "ibm", which was a small computer retail store operating from 1977 to 1980
+ In 1976, Nelson co-founded and briefly served as the advertising director of the "itty bitty machine company",
```
{F18746171}
The visual diff continues to show more differences, except they are not differences. The graphs were not in any way touched by the edits in between.
| {F18746191 height=150} | {F18746190 height=150}
I do notice that the reference numbers have effectively changed due additions higher up in the document. However, those are usually shown in grey/blue with a note about them in the side bar. And in fact, in the left image, there is an example of that.