Ensure absolute path in glob output.

A simple normalization making it easier later.

muppet/gather.py

@@ -29,6 +29,11 @@ class ModuleEntry:
         Absolute path in the filesystem where the module can be found.
     :param strings_output:
         Output of ``puppet strings``.
+    :param metadata:
+        Parsed contents of the modules ``metadata.json``.
+    :param doc_files:
+        List of absolute paths to documentation files provided by the
+        upstream module.
     """
 
     name: str
@@ -98,7 +103,7 @@ def get_module(cache: Cache,
     except FileNotFoundError:
         metadata = {}
 
-    doc_files = glob(os.path.join(path, '*.md'))
+    doc_files = glob(os.path.join(os.path.abspath(path), '*.md'))
 
     return ModuleEntry(name=name,
                        path=path,