Changed link from I/O functions to
File and Datastream Functions

Whitespace issue.

2 spaces after period. Corrected

Change-Id: I04b630863106c78d052f57cd54140d0e2cb1c92f
Reviewed-by: Mitch Curtis <mitch.curtis@digia.com>
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>