[bugfix] fixed footer output to produce valid html when using a logo

new parameters in for paramters.yaml file:
  - added parameter logo_alt_text
  - added parameter logo_height

write_utils.py

@@ -48,14 +48,15 @@ def finish_html_table():
     return '</table>\n'
 
 
-def html_footer(footer_logo=None):
-    footer = ['</body>']
+def html_footer(footer_logo=None, alt_text='Logo', height=30):
     if footer_logo:
-        logo_items = [f'<div class="footer">',
-                      f'  <img style="float: right; padding: 10px;" src="{footer_logo}" height=30px>',
-                      f'</div>']
-        footer += logo_items
-    footer.append('</html>\n')
+        footer = [f'<div class="footer">',
+                  f'  <img style="float: right; padding: 10px;" src="{footer_logo}" height={height} alt="{alt_text}">',
+                  f'</div>']
+    else:
+        footer = []
+    footer.append('</body>')
+    footer.append('</html>')
 
     footer = _convert_to_textstring(footer)
     return footer