Addressed review comments.

Author: vinu2003

Doc/glossary.rst

@@ -222,12 +222,13 @@ Glossary
       See :pep:`343`.
 
     context variable
-      A variable which can have different values depending on it's context.
-      This is similar to TLS(Thread Local Storage) in which each execution
-      thread may have a different value for a variable. In case of context
-      variable, there may be sevaral contexts in one execution thread and it is
-      used to keep track of variables in concurrent asynchronous tasks.
-      See `https://docs.python.org/3/library/contextvars.html`.
+      A variable which can have different values depending on its context.
+      This is similar to Thread-Local Storage in which each execution
+      thread may have a different value for a variable. However, with context
+      variables, there may be several contexts in one execution thread and the
+      main usage for context variables is to keep track of variables in
+      concurrent asynchronous tasks.
+      See :mod:`contextvars`.
 
    contiguous
       .. index:: C-contiguous, Fortran contiguous