Go over jump command docs

Author: rocky

docs/commands/running/jump.rst

@@ -1,5 +1,4 @@
 .. index:: jump
-.. _jump:
 
 Jump
 ----
@@ -16,8 +15,15 @@ You can't jump:
 * into an ``except`` block from outside
 * outside or inside of a code block you are stopped
 
+Jumping to a previous line is one way to reexecuting code.
+Jumping to a return statement may get you back to the caller
+function without running more code in the current frame.
 
 .. seealso::
 
    :ref:`skip <skip>`,
-   :ref:`next <next>`, :ref:`step <step>` :ref:`continue <continue>`, and :ref:`finish <finish>` provide other ways to progress.
+   :ref:`next <next>`, :ref:`step <step>` :ref:`continue <continue>`, and
+   :ref:`finish <finish>` provide other ways to progress.
+
+   :ref:eval <eval>: can be used to run Python code without changing the
+    execution line.

trepan/processor/command/jump.py

@@ -35,11 +35,18 @@ class JumpCommand(DebuggerCommand):
       - into an 'except' block from outside
       - outside or inside of a code block you are stopped
 
+    Jumping to a previous line is one way to reexecuting code.
+    Jumping to a return statement may be similar to you back to the caller
+    without running more code in the current frame.
+
     See also:
     ---------
 
     `skip`, `next`, `step`, `jump`, `continue`, `return` and
     `finish` for other ways to progress execution.
+
+    `eval` can be used to run Python code without changing the
+    execution line.
     """
 
     aliases = ("j",)