improve html layout; add reasonable default for --image-url option

ner.edith.html

@@ -49,7 +49,7 @@
         <div class="col-2">
             <div id="file-region"></div>
         </div>
-        <div class="col-8">
+        <div class="col-9">
             <div class="row">
                 <div class="col text-center">
                     <h3><a href="https://github.com/cneud/ner.edith" target="_blank">ner.edith</a>: named entity recognition editor in html</h3>
@@ -57,7 +57,7 @@
                 </div>
             </div>
         </div>
-        <div class="col-2">
+        <div class="col-1">
         </div>
     </div>
     <div class="row mt-3">
@@ -77,9 +77,9 @@
     <div class="row  mt-3">
         <div class="col-2">
         </div>
-        <div class="col-8 text-center" id="btn-region">
+        <div class="col-9 text-center" id="btn-region">
         </div>
-        <div class="col-2">
+        <div class="col-1">
         </div>
     </div>
 

tools/cli.py

@@ -103,7 +103,7 @@ def extract_doc_links(tsv_file):
 @click.command()
 @click.argument('page-xml-file', type=click.Path(exists=True), required=True, nargs=1)
 @click.argument('tsv-out-file', type=click.Path(), required=True, nargs=1)
-@click.option('--image-url', type=str, default='')
+@click.option('--image-url', type=str, default='http://empty')
 def page2tsv(page_xml_file, tsv_out_file, image_url):
 
     tree = ET.parse(page_xml_file)