DOC: Update escapechar param description for read_csv

[mhlevgen]

• closes DOC: Weird documentation (or behavior) of pd.read_csv escapechar= arg #23717
• tests added / passed
• passes git diff upstream/master -u -- "*.py" | flake8 --diff
• whatsnew entry

[pep8speaks]

Hello @mhlevgen! Thanks for submitting the PR.

• There are no PEP8 issues in the file pandas/io/parsers.py !

[codecov]

Codecov Report

Merging #23770 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #23770   +/-   ##
=======================================
  Coverage   92.24%   92.24%           
=======================================
  Files         161      161           
  Lines       51433    51433           
=======================================
  Hits        47446    47446           
  Misses       3987     3987

Flag	Coverage Δ
#multiple	90.64% <ø> (ø)	⬆️
#single	42.28% <ø> (ø)	⬆️

Impacted Files	Coverage Δ
pandas/io/parsers.py	95.55% <ø> (ø)	⬆️

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[jreback]

what issue is this closing?

[mhlevgen]

I have made a mistake with issue number. The write one is 23717 пн, 19 нояб. 2018 г. в 02:13, Jeff Reback <[email protected]>:

…

what issue is this closing? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#23770 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AmCb1XZOiSjkk0AYbeoIBjIWtnIb0qxvks5uwemsgaJpZM4YoHeR> .

[datapythonista]

@mhlevgen thanks for the contribution. Besides the incorrection regarding the quoting, I don't think the description of the escapechar parameter is very clear. Do you think you can improve it in this same PR?

[datapythonista]

@mhlevgen do you have time to fix the conflicts?

[datapythonista]

Closing as stale