Fixed 'uppon' typos
The word 'uppon' was in the documentation twice, so I changed it to 'upon'
diff --git a/documentation/pyserial_api.rst b/documentation/pyserial_api.rst
index a3b0ebb..545f948 100644
--- a/documentation/pyserial_api.rst
+++ b/documentation/pyserial_api.rst
@@ -243,7 +243,7 @@
:type: bool
Set RTS line to specified logic level. It is possible to assign this
- value before opening the serial port, then the value is applied uppon
+ value before opening the serial port, then the value is applied upon
:meth:`open` (with restrictions, see :meth:`open`).
.. attribute:: dtr
@@ -253,7 +253,7 @@
:type: bool
Set DTR line to specified logic level. It is possible to assign this
- value before opening the serial port, then the value is applied uppon
+ value before opening the serial port, then the value is applied upon
:meth:`open` (with restrictions, see :meth:`open`).
Read-only attributes: