README: Link to where the key names come from

shahinism · Jun 12, 2017 · 02e6382 · 02e6382
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diff --git a/README.rst b/README.rst
@@ -47,3 +47,7 @@ And set your desired keybindings for each widget in `~/.xonshrc` file or set it
 
     $fzf_history_binding = Keys.ControlR
     $fzf_ssh_binding = Keys.ControlS
+
+You can find the names of various keys here_ in ``python-prompt-toolkit``.
+
+.. _here: https://github.com/jonathanslenders/python-prompt-toolkit/blob/master/prompt_toolkit/keys.py