We no longer have two doc systems, move sphinx_doc_src back to doc_src

doc_src/cmds/fish_hg_prompt.rst

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+.. _cmd-fish_hg_prompt:
+
+fish_hg_prompt - output Mercurial information for use in a prompt
+=================================================================
+
+Synopsis
+--------
+
+::
+
+     function fish_prompt
+          echo -n (pwd)(fish_hg_prompt) '$ '
+     end
+
+Description
+-----------
+
+The fish_hg_prompt function displays information about the current Mercurial repository, if any.
+
+`Mercurial <https://www.mercurial-scm.org/>`_ (``hg``) must be installed.
+
+There are numerous customization options, which can be controlled with fish variables.
+
+- ``$fish_color_hg_clean``, ``$fish_color_hg_modified`` and ``$fish_color_hg_dirty`` are colors used when the repository has the respective status.
+
+Some colors for status symbols:
+
+- ``$fish_color_hg_added``
+- ``$fish_color_hg_renamed``
+- ``$fish_color_hg_copied``
+- ``$fish_color_hg_deleted``
+- ``$fish_color_hg_untracked``
+- ``$fish_color_hg_unmerged``
+
+The status symbols themselves:
+
+- ``$fish_prompt_hg_status_added``, default '✚'
+- ``$fish_prompt_hg_status_modified``, default '*'
+- ``$fish_prompt_hg_status_copied``, default '⇒'
+- ``$fish_prompt_hg_status_deleted``, default '✖'
+- ``$fish_prompt_hg_status_untracked``, default '?'
+- ``$fish_prompt_hg_status_unmerged``, default '!'
+
+Finally, ``$fish_prompt_hg_status_order``, which can be used to change the order the status symbols appear in. It defaults to ``added modified copied deleted untracked unmerged``.
+
+See also :ref:`fish_vcs_prompt <cmd-fish_vcs_prompt>`, which will call all supported version control prompt functions, including git, Mercurial and Subversion.
+
+Example
+-------
+
+A simple prompt that displays hg info::
+
+    function fish_prompt
+        ...
+        printf '%s %s$' $PWD (fish_hg_prompt)
+    end
+
+