fix: resolve CI linting errors

tests/test_code_analyzer.py

@@ -60,8 +60,8 @@ struct Point {
 
     def test_summarize_change_simple(self, code_analyzer):
         """Test summarizing simple code changes."""
-        old_code = "def hello():\n    return 'Hello'"
-        new_code = "def hello():\n    return 'Hello, World!'"
+        old_code = "def hello():\\n    return 'Hello'"
+        new_code = "def hello():\\n    return 'Hello, World!'"
 
         summary = code_analyzer.summarize_change(old_code, new_code, "python")
 
@@ -71,7 +71,7 @@ struct Point {
     def test_summarize_change_added_function(self, code_analyzer):
         """Test summarizing when a function is added."""
         old_code = ""
-        new_code = "def new_func():\n    pass"
+        new_code = "def new_func():\\n    pass"
 
         summary = code_analyzer.summarize_change(old_code, new_code, "python")
 
@@ -80,7 +80,7 @@ struct Point {
 
     def test_summarize_change_removed_function(self, code_analyzer):
         """Test summarizing when a function is removed."""
-        old_code = "def old_func():\n    pass"
+        old_code = "def old_func():\\n    pass"
         new_code = ""
 
         summary = code_analyzer.summarize_change(old_code, new_code, "python")
@@ -119,8 +119,7 @@ def multiply(x, y):
 
     def test_fallback_analysis_line_count(self, code_analyzer):
         """Test that fallback analysis includes line count."""
-        old_code = "line1\nline2"
-        new_code = "line1\nline2\nline3"
+        new_code = "line1\\nline2\\nline3"
 
         result = code_analyzer._analyze_without_parser(new_code)