update deramp docs

docs/plugins/deramp.rst

@@ -1,6 +1,13 @@
 deramp
 ======
-Removes all ramps designated for removal from the map. This is useful for
-replicating the old channel digging designation.  It also removes any and
-all 'down ramps' that can remain after a cave-in (you don't have to designate
-anything for that to happen).
+
+Tags:
+:dfhack-keybind:`deramp`
+
+:index:`Removes all ramps designated for removal from the map.
+<deramp; Removes all ramps designated for removal from the map.>` It also
+removes any "floating" down ramps that can remain after a cave-in.
+
+Usage::
+
+    deramp

plugins/deramp.cpp

@@ -109,13 +109,11 @@ command_result df_deramp (color_ostream &out, vector <string> & parameters)
 
 DFhackCExport command_result plugin_init ( color_ostream &out, std::vector <PluginCommand> &commands)
 {
-    commands.push_back(PluginCommand(
-        "deramp", "Replace all ramps marked for removal with floors.",
-        df_deramp, false,
-        "  If there are any ramps designated for removal, they will be instantly\n"
-        "  removed. Any ramps that don't have their counterpart will also be removed\n"
-        "  (fixes bugs with caveins)\n"
-    ));
+    commands.push_back(
+        PluginCommand(
+            "deramp",
+            "Removes all ramps designated for removal from the map.",
+            df_deramp));
     return CR_OK;
 }