Document magic profile as deprecated

Closes  #10693

IPython/core/magics/basic.py

@@ -303,12 +303,14 b' Currently the magic system has the following functions:""",'
 
     @line_magic
     def profile(self, parameter_s=''):
-        """Print your currently active IPython profile.
+        """DEPRECATED since IPython 2.0.
+
+        Raise `UsageError`. To profile code use the :magic:`prun` magic.
+        
 
         See Also
         --------
-        prun : run code using the Python profiler
-               (:meth:`~IPython.core.magics.execution.ExecutionMagics.prun`)
+        prun : run code using the Python profiler (:magic:`prun`)
         """
         raise UsageError("The `%profile` magic has been deprecated since IPython 2.0. "
             "and removed in IPython 6.0. Please use the value of `get_ipython().profile` instead "

docs/source/whatsnew/version5.rst

@@ -75,7 +75,7 b' Miscs'
 * Faster shutdown. :ghpull:`10408` 
 * Fix a crash in reverse search. :ghpull:`10371`
 * added ``Completer.backslash_combining_completions`` boolean option to
- deactivate backslash-tab completion that may conflict with windows path.
+  deactivate backslash-tab completion that may conflict with windows path.
 
 IPython 5.3
 ===========