fix: resolve linting issues in Direct API methods

- Fixed trailing whitespace in docstrings
- Fixed blank lines containing whitespace
- Fixed line length exceeding 100 characters
- All ruff checks now passing

This should resolve CI failures.

Author: jdrhyne

src/nutrient_dws/api/direct.py

@@ -245,7 +245,7 @@ def split_pdf(
             input_file: Input PDF file.
             page_ranges: List of page range dictionaries. Each dict can contain:
                 - 'start': Starting page index (0-based, inclusive). 0 = first page.
-                - 'end': Ending page index (0-based, exclusive). 
+                - 'end': Ending page index (0-based, exclusive).
                         For example: {"start": 0, "end": 2} extracts pages 0-1 (first two pages).
                 - If 'end' is omitted from dict, extracts from 'start' to end of document.
                 Required parameter - must provide at least one range
@@ -289,11 +289,11 @@ def split_pdf(
         # Validate inputs
         if not page_ranges:
             raise ValueError("page_ranges is required - must provide at least one range")
-            
+
         # Limit number of ranges to prevent excessive API calls
         if len(page_ranges) > 50:
             raise ValueError("Maximum 50 page ranges allowed per split operation")
-            
+
         if output_paths and len(output_paths) != len(page_ranges):
             raise ValueError("output_paths length must match page_ranges length")
 
@@ -453,7 +453,10 @@ def duplicate_pdf_pages(
                 parts.append({"file": "file", "pages": {"start": page_index, "end": page_index}})
             else:
                 # For positive indexes, create single-page range with exclusive end
-                parts.append({"file": "file", "pages": {"start": page_index, "end": page_index + 1}})
+                parts.append({
+                    "file": "file",
+                    "pages": {"start": page_index, "end": page_index + 1}
+                })
 
         # Build instructions for duplication
         instructions = {"parts": parts, "actions": []}

tests/integration/test_direct_api_integration.py

@@ -304,12 +304,12 @@ def test_split_pdf_output_paths_length_mismatch_error(self, client, sample_pdf_p
 
         with pytest.raises(ValueError, match="output_paths length must match page_ranges length"):
             client.split_pdf(sample_pdf_path, page_ranges=page_ranges, output_paths=output_paths)
-    
+
     def test_split_pdf_too_many_ranges_error(self, client, sample_pdf_path):
         """Test split_pdf method with too many ranges raises error."""
         # Create 51 ranges (exceeds the 50 limit)
         page_ranges = [{"start": i, "end": i + 1} for i in range(51)]
-        
+
         with pytest.raises(ValueError, match="Maximum 50 page ranges allowed"):
             client.split_pdf(sample_pdf_path, page_ranges=page_ranges)
 
@@ -507,7 +507,7 @@ def test_add_page_invalid_page_count_error(self, client, sample_pdf_path):
         # Test negative page count
         with pytest.raises(ValueError, match="page_count must be at least 1"):
             client.add_page(sample_pdf_path, insert_index=0, page_count=-1)
-            
+
         # Test excessive page count
         with pytest.raises(ValueError, match="page_count cannot exceed 100"):
             client.add_page(sample_pdf_path, insert_index=0, page_count=101)