diffoscope/comparators/json.py

@@ -85,9 +85,9 @@ class JSONFile(File):
         except Exception:
             return
 
-        difference.add_comment(
-            "Similarity: {}%".format(jsondiff.similarity(a, b))
-        )
+        similarity = jsondiff.similarity(a, b)
+        if similarity:
+            difference.add_comment("Similarity: {}%".format(similarity))
 
         difference.add_comment(
             "Differences: {}".format(

diffoscope/comparators/text.py

@@ -65,7 +65,7 @@ class TextFile(File):
                 if difference and order_only_difference(
                     difference.unified_diff
                 ):
-                    difference.add_comment("ordering differences only")
+                    difference.add_comment("Ordering differences only")
                 if my_encoding != other_encoding:
                     if difference is None:
                         difference = Difference(

diffoscope/presenters/html/html.py

@@ -242,10 +242,11 @@ def output_node(ctx, difference, path, indentstr, indentnum):
 
     comments = u""
     if difference.comments:
-        comments = u'{0[1]}<div class="comment">\n{1}{0[1]}</div>\n'.format(
+        comments = u'{1[1]}<div class="comment {0}">{2}{1[1]}</div>\n'.format(
+            "multiline" if len(difference.comments) > 1 else "",
             indent,
-            "".join(
-                u"{0[2]}{1}<br/>\n".format(indent, html.escape(x))
+            "\n".join(
+                u"{1}".format(indent, html.escape(x))
                 for x in difference.comments
             ),
         )

diffoscope/presenters/html/templates.py

@@ -103,6 +103,11 @@ STYLES = """body.diffoscope {
 .diffoscope .comment {
   font-style: italic;
 }
+.diffoscope .comment.multiline {
+  font-style: normal;
+  font-family: monospace;
+  white-space: pre;
+}
 .diffoscope .source {
   font-weight: bold;
 }