git-node-land: mention the "edit" rebase option

Author: gerkai

lib/landing_session.js

@@ -100,8 +100,9 @@ class LandingSession extends Session {
     const { upstream, branch } = this;
     cli.log(
       `There are ${match[1]} commits in the PR.\n` +
-      `Please run \`git rebase ${upstream}/${branch} -i\` ` +
-      'and use `git node land --amend` to amend the commit messages');
+      `Please run \`git rebase ${upstream}/${branch} -i\`, put "edit" on ` +
+      'every commit that\'s gonna stay and use `git node land --amend` to ' +
+      'amend the commit messages');
     // TODO: do git rebase automatically?
   }