Fix build_directory_md.py so it works again on Linux

Revert #1161 because it broke our output: https://travis-ci.org/TheAlgorithms/Python/builds/592863893#L805

Author: cclauss

scripts/build_directory_md.py

@@ -14,7 +14,7 @@ def good_filepaths(top_dir: str = ".") -> Iterator[str]:
                 continue
             if os.path.splitext(filename)[1] in (".py", ".ipynb"):
                 yield os.path.join(dirpath, filename).lstrip("./")
-                
+
 
 def md_prefix(i):
     return f"{i * '  '}*" if i else "##"
@@ -25,7 +25,7 @@ def print_path(old_path: str, new_path: str) -> str:
     for i, new_part in enumerate(new_path.split(os.sep)):
         if i + 1 > len(old_parts) or old_parts[i] != new_part:
             if new_part:
-                print(f"{md_prefix(i-1)} {new_part.replace('_', ' ').title()}")
+                print(f"{md_prefix(i)} {new_part.replace('_', ' ').title()}")
     return new_path
 
 
@@ -36,7 +36,7 @@ def print_directory_md(top_dir: str = ".") -> None:
         if filepath != old_path:
             old_path = print_path(old_path, filepath)
         indent = (filepath.count(os.sep) + 1) if filepath else 0
-        url = "/".join((URL_BASE, filepath.split(os.sep)[1], filename)).replace(" ", "%20")
+        url = "/".join((URL_BASE, filepath, filename)).replace(" ", "%20")
         filename = os.path.splitext(filename.replace("_", " "))[0]
         print(f"{md_prefix(indent)} [{filename}]({url})")