Fallback doc fix (#806)

Author: maddenp-cu

docs/sections/user_guide/cli/tools/fs.rst

@@ -194,7 +194,7 @@ The ``hardlink`` action stages items in a target directory by creating hardlinks
   * Items the user does not have write permission to
   * Directories
 
-* If a hardlink cannot be created but the ``--symlink-fallback`` option is specified, a symlink will be created instead, if possible.
+* If a hardlink cannot be created but the ``--fallback`` option is specified, a copy (given ``--fallback copy``) or a symlink (given ``--fallback symlink``)  will be created instead, if possible.
 
 .. literalinclude:: fs/hardlink-help.cmd
    :language: text

notebooks/config.ipynb

@@ -364,7 +364,7 @@
       "    If ``total`` is ``True``, an exception will be raised if any Jinja2 variables/expressions cannot be\n",
       "    rendered. Otherwise, such variables/expressions will be passed through unchanged in the output.\n",
       "    \n",
-      "    Recognized file extensions are: ini, nml, sh, yaml\n",
+      "    Recognized file extensions are: ``ini``, ``nml``, ``sh``, ``yaml``\n",
       "    \n",
       "    :param input_config: Input config file (``None`` => read ``stdin``).\n",
       "    :param input_format: Input config format (default: deduced from filename extension; ``yaml`` if that fails).\n",
@@ -1003,7 +1003,7 @@
       "compare(path1: 'Path | str', path2: 'Path | str', format1: 'str | None' = None, format2: 'str | None' = None) -> 'bool'\n",
       "    Compare two config files.\n",
       "    \n",
-      "    Recognized file extensions are: ini, nml, sh, yaml\n",
+      "    Recognized file extensions are: ``ini``, ``nml``, ``sh``, ``yaml``\n",
       "    \n",
       "    :param path1: Path to 1st config file.\n",
       "    :param path2: Path to 2nd config file.\n",