use common convention for xml element tree import

Updating the imports for `xml.etree.ElementTree` to use the common
convention for its alias. Makes linters happy.

Signed-off-by: James Knight <james.d.knight@live.com>

sphinxcontrib/confluencebuilder/svg.py

@@ -7,7 +7,7 @@
 from sphinxcontrib.confluencebuilder.util import convert_length
 from sphinxcontrib.confluencebuilder.util import extract_length
 from sphinxcontrib.confluencebuilder.util import find_env_abspath
-import xml.etree.ElementTree as xml_et
+import xml.etree.ElementTree as ET
 
 
 # xml declaration string
@@ -23,7 +23,7 @@ def svg_initialize():
     """
 
     # prevent ns0 namespace introduction if ever generating svg files
-    xml_et.register_namespace('', 'http://www.w3.org/2000/svg')
+    ET.register_namespace('', 'http://www.w3.org/2000/svg')
 
 
 def confluence_supported_svg(builder, node):
@@ -77,7 +77,7 @@ def confluence_supported_svg(builder, node):
         return
 
     modified = False
-    svg_root = xml_et.fromstring(svg_data)  # noqa: S314
+    svg_root = ET.fromstring(svg_data)  # noqa: S314
 
     # determine (if possible) the svgs desired width/height
     svg_height = None
@@ -179,7 +179,7 @@ def confluence_supported_svg(builder, node):
     if height and width:
         svg_root.attrib['height'] = str(height)
         svg_root.attrib['width'] = str(width)
-        svg_data = xml_et.tostring(svg_root)
+        svg_data = ET.tostring(svg_root)
         modified = True
 
     # ensure xml declaration exists

tests/unit-tests/test_svg.py

@@ -4,7 +4,7 @@
 from tests.lib.parse import parse
 from tests.lib.testcase import ConfluenceTestCase
 from tests.lib.testcase import setup_builder
-import xml.etree.ElementTree as xml_et
+import xml.etree.ElementTree as ET
 
 
 class TestSvg(ConfluenceTestCase):
@@ -18,7 +18,7 @@ def _extract_svg_size(self, svg_file):
         with svg_file.open('rb') as f:
             svg_data = f.read()
 
-        svg_root = xml_et.fromstring(svg_data)  # noqa: S314
+        svg_root = ET.fromstring(svg_data)  # noqa: S314
         return int(svg_root.attrib['width']), int(svg_root.attrib['height'])
 
     @setup_builder('confluence')