bpo-34182: Fix test_pydoc running as a script. (GH-8389)

(cherry picked from commit 4e11c461ed39085b8495a35c9367b46d8a0d306d)

Co-authored-by: Bo Bayles <bbayles@gmail.com>
diff --git a/Lib/test/test_pydoc.py b/Lib/test/test_pydoc.py
index 37af664..06f8729 100644
--- a/Lib/test/test_pydoc.py
+++ b/Lib/test/test_pydoc.py
@@ -357,8 +357,9 @@
 
 def get_pydoc_link(module):
     "Returns a documentation web link of a module"
+    abspath = os.path.abspath
     dirname = os.path.dirname
-    basedir = dirname(dirname(__file__))
+    basedir = dirname(dirname(abspath(__file__)))
     doc = pydoc.TextDoc()
     loc = doc.getdocloc(module, basedir=basedir)
     return loc