Update image alt name

ch18_git.md

@@ -57,7 +57,7 @@ vim -d file1.txt file2.txt
 Suppose you want to make the second buffer to have apples, not oranges. To transfer the content from your current position (you're currently on `file1.txt`) to `file2.txt`, first go to the next diff with `]c` (to jump to the previous diff window, use `[c`). The cursor should be on apples now. Run `:diffput`. Both files should now have apples.
 
 <p align="center">
-  <img alt="Finding files in FZF" width="900" height="auto" src="images/diffing-apples.png">
+  <img alt="Diffing Apples" width="900" height="auto" src="images/diffing-apples.png">
 </p>
 
 If you need to transfer the text from the other buffer (orange juice, `file2.txt`) to replace the text on the current buffer (apple juice, `file1.txt`), with your cursor still on `file1.txt` window, first go to the next diff with `]c`. Your cursor now should be on apple juice. Run `:diffget` to get the orange juice from another buffer to replace apple juice in our buffer.
@@ -277,7 +277,7 @@ When you run the `:Git` command without any parameters, vim-fugitive displays a
 - `>` / `<` to display or hide an inline diff of the file name under the cursor.
 
 <p align="center">
-  <img alt="Finding files in FZF" width="900" height="auto" src="images/fugitive-git.png">
+  <img alt="Fugitive Git" width="900" height="auto" src="images/fugitive-git.png">
 </p>
 
 For more, check out `:h fugitive-staging-maps`.
@@ -295,7 +295,7 @@ Some things you can do while in this `"git blame"` mode:
 For more, check out `:h :Git_blame`.
 
 <p align="center">
-  <img alt="Finding files in FZF" width="900" height="auto" src="images/fugitive-git-blame.png">
+  <img alt="Fugitive Git Blame" width="900" height="auto" src="images/fugitive-git-blame.png">
 </p>
 
 ## Gdiffsplit
@@ -303,7 +303,7 @@ For more, check out `:h :Git_blame`.
 When you run the `:Gdiffsplit` command, vim-fugitive runs a `vimdiff` of the current file's latest changes against the index or work tree. If you run `:Gdiffsplit <commit>`, vim-fugitive runs a `vimdiff` against that file inside `<commit>`.
 
 <p align="center">
-  <img alt="Finding files in FZF" width="900" height="auto" src="images/fugitive-gdiffsplit.png">
+  <img alt="Fugitive Gdiffsplit" width="900" height="auto" src="images/fugitive-gdiffsplit.png">
 </p>
 
 Because you are in a `vimdiff` mode, you can *get* or *put* the diff with `:diffput` and `:diffget`.
@@ -319,7 +319,7 @@ When you run the `:Gread` command in a file after you make changes, vim-fugitive
 When you run the `:Gclog` command, vim-fugitive displays the commit history. It is like running the `git log` command. Vim-fugitive uses Vim's quickfix to accomplish this, so you can use `:cnext` and `:cprevious` to traverse to the next or previous log information. You can open and close the log list with `:copen` and `:cclose`.
 
 <p align="center">
-  <img alt="Finding files in FZF" width="900" height="auto" src="images/fugitive-git-log.png">
+  <img alt="Fugitive Git Log" width="900" height="auto" src="images/fugitive-git-log.png">
 </p>
 
 While in this `"git log"` mode, you can do two things: