DOC: Fix docstring formatting

src/caoscrawler/__init__.py

-from . import converters, utils
+from . import converters, utils, xml_converter
 try:
     from .conv_impl.spss import SPSSConverter
 except ImportError as err:

src/caoscrawler/xml_converter.py

@@ -48,9 +48,10 @@ from .converters import SimpleFileConverter, ConverterValidationError, Converter
 
 class XMLFileConverter(SimpleFileConverter):
 
-    """
-    Convert XML files. See https://gitlab.indiscale.com/caosdb/src/caosdb-crawler/-/issues/145
+    """Convert XML files. See
+    https://gitlab.indiscale.com/caosdb/src/caosdb-crawler/-/issues/145
     for the current suggestion for the specification.
+
     """
 
     def create_children(self, generalStore: GeneralStore, element: StructureElement):
@@ -72,33 +73,38 @@ class XMLFileConverter(SimpleFileConverter):
 
 class XMLTagConverter(Converter):
     def create_children(self, generalStore: GeneralStore, element: StructureElement):
-        """
-        Children that are generated by this function are the result of the xpath query given in
-        the yaml property "xpath". Its default (when not given) is "child::*", so the direct children
-        of the current xml node.
-        The xpath expression must be designed in a way that it returns xml tags (and no attributes or texts).
-        That means, that the axis "attribute::" and the function "text()" must not be used.
+        """Children that are generated by this function are the
+        result of the xpath query given in the yaml property
+        ``xpath``. Its default (when not given) is ``child::*``, so the
+        direct children of the current xml node. The xpath expression
+        must be designed in a way that it returns xml tags (and no
+        attributes or texts). That means, that the axis ``attribute::``
+        and the function ``text()`` must not be used.
+
+        The following yaml properties can be used to generate other
+        types of nodes (text nodes and attribute nodes) as subtree
+        structure elements:
 
-        The following yaml properties can be used to generate other types of nodes (text nodes and attribute nodes)
-        as subtree structure elements:
+        ::
 
-        # _*_ marks the default:
-        attribs_as_children: true  # true / _false_
-        text_as_children: true  # true / _false_
-        tags_as_children: true  # _true_ / false
+            # _*_ marks the default:
+            attribs_as_children: true  # true / _false_
+            text_as_children: true  # true / _false_
+            tags_as_children: true  # _true_ / false
 
         The default is to generate the tags matched by the xpath expression only.
+        
         - When text_as_children is set to true, text nodes will be generated that contain the text
           contained in the matched tags.
         - When attribs_as_children is set to true, attribute nodes will be generated from the attributes
           of the matched tags.
 
-        Namespaces
-        ----------
+        Notes
+        -----
         The default is to take the namespace map from the current node and use it in xpath queries.
         Because default namespaces cannot be handled by xpath, it is possible to remap the default namespace
-        using the key "default_namespace".
-        The key "nsmap" can be used to define additional nsmap entries.
+        using the key ``default_namespace``.
+        The key ``nsmap`` can be used to define additional nsmap entries.
 
         """
         if not isinstance(element, XMLTagElement):