Indent the ellipsis between non-adjacent lines:

Use the last line indent so that the result can be
un-indented by the caller. It prevents results like this:

```
    /* block 1 */
...
    /* block 2 */
```

turning them into

```
    /* block 1 */
    ...
    /* block 2 */
```

which will be dedented by the caller.

Author: dmitry-timofeev

codeinclude/resolver.py

@@ -89,11 +89,19 @@ def select(
     last_selected = 0
     for i in sorted(selected_lines):
         if i > (last_selected + 1) and last_selected != 0:
-            result += "\n⋯\n\n"
+            # Add an ellipsis between non-adjacent lines
+            last_line = source_lines[last_selected - 1]
+            # Use the last line indent so that the result can be un-indented by the caller.
+            indent = leading_spaces(last_line)
+            result += f"\n{indent}⋯\n\n"
         result += source_lines[i - 1] + "\n"
         last_selected = i
 
     if result == "":
         return text
 
     return result
+
+
+def leading_spaces(s: str) -> str:
+    return ' ' * (len(s) - len(s.lstrip()))

tests/codeinclude/test_resolver.py

@@ -207,6 +207,7 @@ def test_inside_block_several_matching_blocks(self):
             inside_block="matching_block")
         self.maxDiff = None
         self.assertEquals(("  /* inside first */\n"
-                           "\n⋯\n\n"
+                           "\n"
+                           "  ⋯\n\n"
                            "  /* inside second */\n"),
                           result)