Update examples

README.md

@@ -233,14 +233,14 @@ find * -type f | fzf > selected
 Without STDIN pipe, fzf will traverse the file system under the current
 directory to get the list of files.
 
-> You can override the default behavior
-> * By setting `$FZF_DEFAULT_COMMAND` to a command that generates the desired list
-> * Or by setting `--walker`, `--walker-root`, and `--walker-skip` options in `$FZF_DEFAULT_OPTS`
-
 ```sh
 vim $(fzf)
 ```
 
+> You can override the default behavior
+> * Either by setting `$FZF_DEFAULT_COMMAND` to a command that generates the desired list
+> * Or by setting `--walker`, `--walker-root`, and `--walker-skip` options in `$FZF_DEFAULT_OPTS`
+
 > *:bulb: A more robust solution would be to use `xargs` but we've presented
 > the above as it's easier to grasp*
 > ```sh
@@ -398,6 +398,7 @@ fish.
       ```sh
       # Preview file content using bat (https://github.com/sharkdp/bat)
       export FZF_CTRL_T_OPTS="
+        --walker-skip .git,node_modules,target
         --preview 'bat -n --color=always {}'
         --bind 'ctrl-/:change-preview-window(down|hidden|)'"
       ```
@@ -422,7 +423,9 @@ fish.
     - Set `FZF_ALT_C_OPTS` to pass additional options to fzf
       ```sh
       # Print tree structure in the preview window
-      export FZF_ALT_C_OPTS="--preview 'tree -C {}'"
+      export FZF_ALT_C_OPTS="
+        --walker-skip .git,node_modules,target
+        --preview 'tree -C {}'"
       ```
 
 If you're on a tmux session, you can start fzf in a tmux split-pane or in