Fix output of jj debug completion --help

The help strings for fish and zsh were inverted.

CHANGELOG.md

@@ -98,6 +98,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   and duplicate commit no longer crashes. The fix should also resolve any remaining
   instances of https://github.com/martinvonz/jj/issues/27.
 
+* Fix the output of `jj debug completion --help` by reversing fish and zsh text.
+
 ### Contributors
 
 Thanks to the people who made this release happen!

src/commands/mod.rs

@@ -833,17 +833,17 @@ struct DebugCompletionArgs {
     ///
     /// Apply it by running this:
     ///
-    /// autoload -U compinit
-    /// compinit
-    /// source <(jj debug completion --zsh | sed '$d')  # remove the last line
-    /// compdef _jj jj
+    /// jj debug completion --fish | source
     #[arg(long, verbatim_doc_comment)]
     fish: bool,
     /// Print a completion script for Zsh
     ///
     /// Apply it by running this:
     ///
-    /// jj debug completion --fish | source
+    /// autoload -U compinit
+    /// compinit
+    /// source <(jj debug completion --zsh | sed '$d')  # remove the last line
+    /// compdef _jj jj
     #[arg(long, verbatim_doc_comment)]
     zsh: bool,
 }