Fix backslash logic

[juanjoDiaz]

The issues is that line.replace(/\\\\/g,'\\') is performed twice during the CSV. And the test are tweaked to pass with this weird logic.

In the the should parse JSON values with trailing backslashes test for example:
The JSON file contains "Audi\\\\". However, "Audi\" is expected in the resulting CSV.
I would expect the correct escaped value to be "Audi\\"

Or the should not escape quotes with double quotes, when there is a backslash in the end test receives as input

[
  {"a string": "with a description"},
  {"a string": "with a description and \"quotes and backslash\\"},
  {"a string": "with a description and \"quotes and backslash\\\\"}
]

However, it expects and output like:

"a string"
"with a description"
"with a description and ""quotes and backslash\"
"with a description and ""quotes and backslash\"

It seems completely wrong that 2 strings that are different in the JSON are yielding exactly the same values in the CSV.
I would expect the final row to be "with a description and ""quotes and backslash\\"

[coveralls]

Coverage remained the same at 100.0% when pulling f700c4c on juanjoDiaz:bugfix/fix_backslash_logic into 9c861ed on zemirco:master.

[coveralls]

Coverage remained the same at 100.0% when pulling f700c4c on juanjoDiaz:bugfix/fix_backslash_logic into 9c861ed on zemirco:master.

[coveralls]

Coverage remained the same at 100.0% when pulling f700c4c on juanjoDiaz:bugfix/fix_backslash_logic into 9c861ed on zemirco:master.

[knownasilya]

Good catch! I never noticed that!