Link to issue number:

None.

Summary of the issue:

Previously work was done to remove all usage of unichr from Python3, however brailleInput.py was not touched as it was thought that this would be handled when updating braille drivers in #9736.
However, pr #9736 does not do this.
Therefore, currently when trying to type on a braille display such as an Orbit Reader, the following traceback is seen:

Traceback (most recent call last):
  File "scriptHandler.py", line 189, in executeScript
    script(gesture)
  File "globalCommands.py", line 2059, in script_braille_dots
    brailleInput.handler.input(gesture.dots)
  File "brailleInput.py", line 247, in input
    if self._translate(endWord):
  File "brailleInput.py", line 129, in _translate
    data = u"".join([unichr(cell | LOUIS_DOTS_IO_START) for cell in self.bufferBraille[:pos]])
  File "brailleInput.py", line 129, in <listcomp>
    data = u"".join([unichr(cell | LOUIS_DOTS_IO_START) for cell in self.bufferBraille[:pos]])
NameError: name 'unichr' is not defined

Description of how this pull request fixes the issue:

All references to unichr in brailleInput.py have been changed to chr. Also, any mention of the unicode type in docstrings has been changed to str.

Testing performed:

Typed the following sentence on an Orbit Reader, using English 6 dot computer braille, UEB grade1 and UEB grade2, using contractions where possible:
"Hello, this is a test to see if this works."
Confirmed that the correct output was written and no traceback was produced.

Known issues with pull request:

None.

Change log entry:

None.