xml input: Ensure namespaces don't break sheet titles

Namespaces contain colons which aren't permitted in Excel sheet names.

flattentool/schema.py

@@ -42,7 +42,7 @@ def make_sub_sheet_name(
             x[:truncation_length] for x in parent_path.split(path_separator) if x != "0"
         )
         + property_name
-    )
+    ).replace(":", "-")
 
 
 class TitleLookup(UserDict):

flattentool/tests/fixtures/iati_namespaces.xml

@@ -0,0 +1,16 @@
+<?xml version='1.0' encoding='utf-8'?>
+<iati-activities xmlns:customns="http://example.com/2">
+  <!--XML generated by flatten-tool-->
+  <iati-activity xmlns:customns="http://example.com/1" last-updated-datetime="2011-10-01T00:00:00+00:00">
+    <customns:test>
+      <customns:part>two</customns:part>
+      <customns:part>two</customns:part>
+    </customns:test>
+  </iati-activity>
+  <iati-activity last-updated-datetime="2016-01-01T00:00:00+00:00">
+    <customns:test>
+      <customns:part>three</customns:part>
+      <customns:part>four</customns:part>
+    </customns:test>
+  </iati-activity>
+</iati-activities>

flattentool/tests/test_init.py

@@ -7,7 +7,7 @@
 
 import pytest
 
-from flattentool import decimal_datetime_default, unflatten
+from flattentool import decimal_datetime_default, flatten, unflatten
 
 
 def original_cell_and_row_locations(data):
@@ -1452,3 +1452,13 @@ def test_commands_id_name(tmpdir, input_format):
         ],
         "some": "data",
     }
+
+
+def test_flatten_xml(tmpdir):
+    flatten(
+        "flattentool/tests/fixtures/iati_namespaces.xml",
+        output_name=tmpdir.join("flattened_xml").strpath,
+        id_name="iati-identifier",
+        root_list_path="iati-activity",
+        xml=True,
+    )