next/prev: make first line of help text consistent

This drops the trailing period for consistency with other commands,
and rephrases them a bit for consistency between each other.

cli/src/commands/next.rs

@@ -23,8 +23,7 @@ use crate::cli_util::{short_commit_hash, CommandHelper, WorkspaceCommandHelper};
 use crate::command_error::{user_error, CommandError};
 use crate::ui::Ui;
 
-/// Move the current working copy commit to the next child revision in the
-/// repository.
+/// Move the working-copy commit to the child revision
 ///
 /// The command moves you to the next child in a linear fashion.
 ///

cli/src/commands/prev.rs

@@ -21,7 +21,7 @@ use crate::command_error::{user_error, CommandError};
 use crate::commands::next::choose_commit;
 use crate::ui::Ui;
 
-/// Move the working copy commit to the parent of the current revision.
+/// Move the working-copy commit to the parent revision
 ///
 ///
 /// The command moves you to the parent in a linear fashion.

cli/tests/cli-reference@.md.snap

@@ -121,11 +121,10 @@ To get started, see the tutorial at https://github.com/martinvonz/jj/blob/main/d
 * `log` — Show revision history
 * `move` — Move changes from one revision into another
 * `new` — Create a new, empty change and (by default) edit it in the working copy
-* `next` — Move the current working copy commit to the next child revision in the
-repository.
+* `next` — Move the working-copy commit to the child revision
 * `obslog` — Show how a change has evolved
 * `operation` — Commands for working with the operation log
-* `prev` — Move the working copy commit to the parent of the current revision.
+* `prev` — Move the working-copy commit to the parent revision
 * `rebase` — Move revisions to different parent(s)
 * `resolve` — Resolve a conflicted file with an external merge tool
 * `restore` — Restore paths from another revision
@@ -1142,8 +1141,7 @@ For more information, see https://github.com/martinvonz/jj/blob/main/docs/workin
 
 ## `jj next`
 
-Move the current working copy commit to the next child revision in the
-repository.
+Move the working-copy commit to the child revision
 
 The command moves you to the next child in a linear fashion.
 
@@ -1346,7 +1344,7 @@ This restores the repo to the state at the specified operation, effectively undo
 
 ## `jj prev`
 
-Move the working copy commit to the parent of the current revision.
+Move the working-copy commit to the parent revision
 
 
 The command moves you to the parent in a linear fashion.