Proposing a PR to fix a few small typos

[timgates42]

Issue Type

[x] Bug (Typo)

Steps to Replicate and Expected Behaviour

• Examine quantecon/markov/tests/test_ddp.py and observe approxmation, however expect to see approximation.
• Examine quantecon/game_theory/tests/test_vertex_enumeration.py and observe reponse, however expect to see response.
• Examine quantecon/estspec.py and observe frequences, however expect to see frequencies.
• Examine docs/sphinxext/ipython_console_highlighting.py and observe typicaly, however expect to see typically.
• Examine quantecon/compute_fp.py and observe theorm, however expect to see theorem.
• Examine quantecon/lqcontrol.py and observe symetric, however expect to see symmetric.
• Examine quantecon/game_theory/vertex_enumeration.py and observe reprensenting, however expect to see representing.
• Examine quantecon/tests/test_ivp.py and observe parameteric, however expect to see parametric.
• Examine docs/sphinxext/ipython_directive.py and observe orignal, however expect to see original.
• Examine quantecon/game_theory/pure_nash.py and observe equilibirum, however expect to see equilibrium.
• Examine quantecon/util/notebooks.py and observe defualt, however expect to see default.
• Examine quantecon/filter.py and observe arrray, however expect to see array.
• Examine quantecon/lss.py and observe convariance, however expect to see covariance.

Notes

Semi-automated issue generated by
https://github.com/timgates42/meticulous/blob/master/docs/NOTE.md

To avoid wasting CI processing resources a branch with the fix has been
prepared but a pull request has not yet been created. A pull request fixing
the issue can be prepared from the link below, feel free to create it or
request @timgates42 create the PR. Alternatively if the fix is undesired please
close the issue with a small comment about the reasoning.

https://github.com/timgates42/QuantEcon.py/pull/new/bugfix_typos

Thanks.

[oyamad]

@timgates42 PR would be appreciated!

[timgates42]

Thanks @oyamad have added one