Update docs for external diff program

README.md

@@ -88,13 +88,13 @@ comparing revisions 2 and 3 of deployment.apps/nginx
 
 The `k revisions diff` command uses `diff -u -N` to compare revisions by default.
 It also respects the `KUBECTL_EXTERNAL_DIFF` environment variable like the `kubectl diff` command.
-To get a nicer diff view, you can use one of these:
+To get a nicer diff output, you can use one of these:
 
 ```bash
-# Add color to the diff output
-k revisions diff deploy nginx | colordiff
-# Specify an external diff programm
-KUBECTL_EXTERNAL_DIFF="colordiff -u" k revisions diff deploy nginx
+# Use a colored external diff program
+export KUBECTL_EXTERNAL_DIFF="colordiff -u"
+# Use dyff as a rich diff program
+export KUBECTL_EXTERNAL_DIFF="dyff between --omit-header"
 # Show diff in VS Code
-KUBECTL_EXTERNAL_DIFF="code --diff --wait" k revisions diff deploy nginx
+export KUBECTL_EXTERNAL_DIFF="code --diff --wait"
 ```

pkg/cmd/diff/diff.go

@@ -77,12 +77,12 @@ files as empty) options.`,
   # Compare the previous revision and the revision before that
   kubectl revisions diff deploy nginx --revision=-2
   
-  # Add color to the diff output
-  kubectl revisions diff deploy nginx | colordiff
-  
-  # Specify an external diff programm
+  # Use a colored external diff program
   KUBECTL_EXTERNAL_DIFF="colordiff -u" kubectl revisions diff deploy nginx
   
+  # Use dyff as a rich diff program
+  KUBECTL_EXTERNAL_DIFF="dyff between --omit-header" kubectl revisions diff deploy nginx
+  
   # Show diff in VS Code
   KUBECTL_EXTERNAL_DIFF="code --diff --wait" kubectl revisions diff deploy nginx
 `,