[doc] Fix a typo in the graphlib docs (python#22030)

mariosasko · Seth Sims · commit 686da9625e2f · 2020-10-17T21:30:53.000-04:00
diff --git a/Doc/library/graphlib.rst b/Doc/library/graphlib.rst
@@ -121,7 +121,7 @@
           if ts.is_active():
               ...
 
-      if possible to simply do::
+      it is possible to simply do::
 
           if ts:
               ...
