style: shorten docstring comment to fix E501

Author: maknelso

backtracking/word_search_path.py

@@ -65,16 +65,19 @@ def get_word_path(
     >>> # 1. Find "CATS" starting at (0,0). Initial key is 0.
     >>> get_word_path(board, "CATS", 0, 0, 0, {0}, [])
     [(0, 0), (0, 1), (0, 2), (1, 2)]
-    
-    >>> # 2. Find "BC" starting at (2,1). 
+
+    >>> # 2. Find "BC" starting at (2,1).
     >>> # Key for (2,1) in 3x3 is: (3 * 3 * 2) + 1 = 19
     >>> get_word_path(board, "BC", 2, 1, 0, {19}, [])
     [(2, 1), (2, 2)]
-    
-    >>> # 3. Partial search: current_path already has (0,0), looking for "ATS" starting at (0,1)
-    >>> # Key for (0,1) is 1. Visited includes the 'C' at key 0.
+
+    >>> # 3: Partial search with existing path
     >>> get_word_path(board, "ATS", 0, 1, 0, {0, 1}, [(0, 0)])
     [(0, 0), (0, 1), (0, 2), (1, 2)]
+
+    >>> # 4. Failure case: First letter doesn't match current cell
+    >>> get_word_path(board, "DOG", 0, 0, 0, {0}, []) is None
+    True
     """
 
     if board[row][column] != word[word_index]: