fix: Resolves CI test failures and linting errors

tests/test_pdf_extractor.py

@@ -128,15 +128,15 @@ class TestLanguageDetection(unittest.TestCase):
 
         code = """
         $primary-color: #3498db;
-        
+
         @mixin border-radius($radius) {
           border-radius: $radius;
         }
-        
+
         .button {
           color: $primary-color;
           @include border-radius(5px);
-          
+
           &:hover {
             background: darken($primary-color, 10%);
           }
@@ -146,17 +146,17 @@ class TestLanguageDetection(unittest.TestCase):
         language, confidence = extractor.detect_language_from_code(code)
         self.assertEqual(language, "scss")
         self.assertGreater(confidence, 0.8)
-        
+
     def test_detect_dart_with_confidence(self):
         """Test Dart detection"""
         extractor = self.PDFExtractor.__new__(self.PDFExtractor)
         from skill_seekers.cli.language_detector import LanguageDetector
-        
+
         extractor.language_detector = LanguageDetector(min_confidence=0.15)
-        
+
         code = """
         import 'package:flutter/material.dart';
-        
+
         class MyApp extends StatelessWidget {
           @override
           Widget build(BuildContext context) {
@@ -166,7 +166,7 @@ class TestLanguageDetection(unittest.TestCase):
           }
         }
         """
-        
+
         language, confidence = extractor.detect_language_from_code(code)
         self.assertEqual(language, "dart")
         self.assertGreater(confidence, 0.6)
@@ -175,12 +175,12 @@ class TestLanguageDetection(unittest.TestCase):
         """Test Scala detection"""
         extractor = self.PDFExtractor.__new__(self.PDFExtractor)
         from skill_seekers.cli.language_detector import LanguageDetector
-        
+
         extractor.language_detector = LanguageDetector(min_confidence=0.15)
-        
+
         code = """
         case class Person(name: String, age: Int)
-        
+
         object Main extends App {
           val person = Person("Alice", 30)
           person match {
@@ -189,7 +189,7 @@ class TestLanguageDetection(unittest.TestCase):
           }
         }
         """
-        
+
         language, confidence = extractor.detect_language_from_code(code)
         self.assertEqual(language, "scala")
         self.assertGreater(confidence, 0.7)
@@ -198,23 +198,23 @@ class TestLanguageDetection(unittest.TestCase):
         """Test SASS detection"""
         extractor = self.PDFExtractor.__new__(self.PDFExtractor)
         from skill_seekers.cli.language_detector import LanguageDetector
-        
+
         extractor.language_detector = LanguageDetector(min_confidence=0.15)
-        
+
         code = """
         $primary-color: #3498db
-        
+
         =border-radius($radius)
           border-radius: $radius
-        
+
         .button
           color: $primary-color
           +border-radius(5px)
-          
+
           &:hover
             background: darken($primary-color, 10%)
         """
-        
+
         language, confidence = extractor.detect_language_from_code(code)
         self.assertEqual(language, "sass")
         self.assertGreater(confidence, 0.8)
@@ -223,19 +223,19 @@ class TestLanguageDetection(unittest.TestCase):
         """Test Elixir detection"""
         extractor = self.PDFExtractor.__new__(self.PDFExtractor)
         from skill_seekers.cli.language_detector import LanguageDetector
-        
+
         extractor.language_detector = LanguageDetector(min_confidence=0.15)
-        
+
         code = """
         defmodule MyApp.User do
           def greet(name) do
             "Hello, #{name}"
           end
-          
+
           defp calculate_age(birth_year) do
             2024 - birth_year
           end
-          
+
           def process(data) do
             data
             |> String.trim()
@@ -244,7 +244,7 @@ class TestLanguageDetection(unittest.TestCase):
           end
         end
         """
-        
+
         language, confidence = extractor.detect_language_from_code(code)
         self.assertEqual(language, "elixir")
         self.assertGreater(confidence, 0.8)
@@ -253,9 +253,9 @@ class TestLanguageDetection(unittest.TestCase):
         """Test Lua detection"""
         extractor = self.PDFExtractor.__new__(self.PDFExtractor)
         from skill_seekers.cli.language_detector import LanguageDetector
-        
+
         extractor.language_detector = LanguageDetector(min_confidence=0.15)
-        
+
         code = """
         local function calculate_sum(numbers)
           local total = 0
@@ -264,12 +264,12 @@ class TestLanguageDetection(unittest.TestCase):
           end
           return total
         end
-        
+
         local items = {1, 2, 3, 4, 5}
         local result = calculate_sum(items)
         print("Sum: " .. result)
         """
-        
+
         language, confidence = extractor.detect_language_from_code(code)
         self.assertEqual(language, "lua")
         self.assertGreater(confidence, 0.7)
@@ -278,32 +278,32 @@ class TestLanguageDetection(unittest.TestCase):
         """Test Perl detection"""
         extractor = self.PDFExtractor.__new__(self.PDFExtractor)
         from skill_seekers.cli.language_detector import LanguageDetector
-        
+
         extractor.language_detector = LanguageDetector(min_confidence=0.15)
-        
-        code = """
+
+        code = r"""
         #!/usr/bin/perl
         use strict;
         use warnings;
-        
+
         sub process_line {
           my $line = shift;
           chomp($line);
-          
+
           if ($line =~ /^(\w+)=(\w+)$/) {
             my ($name, $value) = ($1, $2);
             return "$name has value $value";
           }
           return undef;
         }
-        
+
         my @lines = ("foo=10", "bar=20");
         foreach my $line (@lines) {
           my $result = process_line($line);
           print $result if defined $result;
         }
         """
-        
+
         language, confidence = extractor.detect_language_from_code(code)
         self.assertEqual(language, "perl")
         self.assertGreater(confidence, 0.8)