How would you verify that the changes from a feature branch are successfully merged into the master branch?

To verify that the changes from a feature branch are successfully merged into the master branch, you can follow these steps:

Switch to the master branch:
```
git checkout master
```
Pull the latest changes (if working with a remote repository):
```
git pull origin master
```
Check the commit history to see if the merge commit is present:
```
git log --oneline
```
Look for a commit message that indicates the merge of the feature branch.
Compare the branches to see if the changes from the feature branch are included:
```
git diff feature-branch
```
If there are no differences, it means all changes from the feature branch are now in the master branch.
Check the files that were modified in the feature branch to ensure they exist in the master branch:
```
git status
```
Run tests or build the project (if applicable) to ensure everything works as expected after the merge.

By following these steps, you can confirm that the changes from the feature branch have been successfully merged into the master branch.