add graph content

GIT_ASSIGNMENT.md

@@ -148,11 +148,24 @@
 
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-## 🕵️ Step 15: Git Merge
+## 🔀 Step 16: Git Merge
 
-🔎 _Tracked who last modified each line of a file using_ `git merge filename`.
+🔗 _Merged changes from one branch into another using_ `git merge branchname`.
 
-![Git blame](merge.png)
+![Git merge](merge.png)
+
+📌 Helps integrate changes from different branches into the main branch.
+
+---
+
+## 🌐 Step 17: Git Log (All, Oneline Graph)
+
+📊 _Viewed a compact, visual history of all commits across branches using_  
+`git log --oneline --graph --all`.
+
+![Git graph all](graphall.png)
+
+📌 Great for visualizing the entire project history at a glance.
 
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@@ -170,7 +183,8 @@
 10. ✅ **Git Remote** – Checked repository connections.
 11. ✅ **Git Ignore** – Excluded unnecessary files.
 12. ✅ **Git File History & Blame** – Tracked changes and contributors line by line.
-13. ✅ **Git Merge** – Identifies who last modified each line in the file..
+13. ✅ **Git Merge** – Combined branch histories.
+14. ✅ **Git Graph (all, oneline)** – Visualized all commits and branches.
 
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