Merge pull request progit#1284 from katrinleinweber/1269-aggregate-core.editor-commands

Add Xi to core.editor list in Appendix

Author: ben

C-git-commands.asc

@@ -60,6 +60,7 @@ Accompanying the configuration instructions in <<ch01-getting-started#_editor>>,
 |Vim |`git config --global core.editor "vim"`
 |VS Code |`git config --global core.editor "code --wait"`
 |WordPad |`git config --global core.editor '"C:\Program Files\Windows NT\Accessories\wordpad.exe"'"`
+|Xi | `git config --global core.editor "xi --wait"`
 |==============================
 
 [NOTE]