change diff format

action.yml

@@ -161,30 +161,37 @@ inputs:
       $summary
       ```
 
-      Here is the content of file `$filename` -
+      Here is the content of file `$filename` with 
+      line numbers -
       ```
       $file_content
       ```
 
-      Format for changes and review comments (if any) 
-      on line ranges (line numbers in new file) -
-      <start_line-end_line>: 
-      ```diff
-      <diff_hunk>
+      Format for changes and review comments (if any) -
+
+      old_hunk:
+      ```
+      <old code with line numbers>
+      ```
+      new_hunk:
+      ```
+      <new code with line numbers>
       ```
       ```text
       <existing review comments>
       ```
       ---
-      <start_line-end_line>: 
-      ```diff
-      <diff_hunk>
+      old_hunk:
+      ```
+      <old code with line numbers>
+      ```
+      new_hunk:
+      ```
+      <new code with line numbers>
       ```
       ---
       ...
 
-      The <diff_hunk> is in the unidiff format.
-
       Changes for review -
       $patches
 
@@ -193,13 +200,16 @@ inputs:
       line ranges and review comments applicable for that line range. 
       Any other commentary outside of this format will be ignored 
       and will not be read by the parser -
-      <review_start_line-review_end_line>:
+
+      <start_line_number_new_code>-<end_line_number_new_code>:
       <your review>
       ---
       ...
 
-      Make sure <review_start_line> and <review_end_line> for each review 
-      must be within line ranges in the changes above. Don't echo back the 
+      It's important that <start_line_number_new_code> and 
+      <end_line_number_new_code> for each review must be within 
+      line ranges of new_hunks as you cannot make comments 
+      on line numbers of old_hunks. Don't echo back the 
       code provided to you as the line number range is sufficient to map 
       your comment to the relevant code section in GitHub. Your responses 
       will be recorded as multi-line review comments on the GitHub pull 

src/commenter.ts

@@ -171,7 +171,7 @@ ${tag}`
 
       if (!found) {
         core.info(
-          `Creating new review comment for ${path}:${end_line}: ${message}`
+          `Creating new review comment for ${path}:${start_line}-${end_line}: ${message}`
         )
         await octokit.pulls.createReviewComment({
           owner: repo.owner,
@@ -186,7 +186,9 @@ ${tag}`
         })
       }
     } catch (e) {
-      core.warning(`Failed to post review comment: ${e}`)
+      core.warning(
+        `Failed to post review comment, for ${path}:${start_line}-${end_line}: ${e}`
+      )
     }
   }
 
@@ -253,8 +255,8 @@ ${COMMENT_REPLY_TAG}
     return comments.filter(
       (comment: any) =>
         comment.path === path &&
-        comment.start_line === start_line &&
-        comment.line === end_line &&
+        comment.start_line >= start_line &&
+        comment.line <= end_line &&
         comment.body !== ''
     )
   }