A demo of how diffs behave in a GitHub PR.
When the topic branch is checked out, the contents of the demo.md file were (at commit 6bd4912):
# Demo File
Line 1
Line 2
Line 3
Line 4
Line 5
The topic branch contains a new commit (abc051f) that modified the first line to:
Line 1 updated in topic branch.
A new commit (bcb60f4) was also made to the main branch that added the following line at the end of the file:
New line added directly in main branch
In the pull request from the topic branch to the main branch, we see the following diff:
This is the diff between the latest commit in the topic branch (i.e. abc051f) and the last common commit between the two branches (i.e. 6bd4912). It does not contain changes from the new commits on the main branch.
To see changes between the two latest commits on both branches, we can use the following endpoint: https://github.com/ravimashru/pr-diff-demo/compare/bcb60f4..abc051f
Note that this diff shows how to go from commit bcb60f4 (the current state of the main branch) to abc051f (the current state of the topic branch). That's why we see the changes added in the main branch as a deletion, and the changes in the topic branch as an addition.