Misleading read_csv() error message. It says lines but refers to rows.
This is not an error per se but might misdirect others as it did to me.

```python
from io import StringIO
# if not using python 3:
# from StringIO import StringIO 
import pandas as pd

TESTDATA = StringIO("""c1;c2;c3
    1,"some text"
    2,"some more 
    text that is 
    multiple lines"
    3,"more text"
    4,"text with missing quote
    """)

pd.read_csv(TESTDATA)

```
#### Problem description

This code results in the following message

`ParserError: Error tokenizing data. C error: EOF inside string starting at line 4`
which seems correct at first sight. But actually the problematic string does not start at line 4 it starts at **row 4**. I  was working with a very large file and did not have the chance to debug it easily. I spendt considerable time trying to figure out the problem with that line in the file.

In a csv file every line does not necessarily correspond to a row.

#### Expected Output
`ParserError: Error tokenizing data. C error: EOF inside string starting at row 4`

#### Output of ``pd.show_versions()``

<details>

INSTALLED VERSIONS
------------------
commit: None
python: 3.6.5.final.0
python-bits: 64
OS: Linux
OS-release: 4.16.7-041607-generic
machine: x86_64
processor: x86_64
byteorder: little
LC_ALL: None
LANG: en_US.UTF-8
LOCALE: en_US.UTF-8

pandas: 0.22.0
pytest: 3.5.1
pip: 18.0
setuptools: 39.1.0
Cython: 0.28.2
numpy: 1.14.3
scipy: 1.1.0
pyarrow: None
xarray: None
IPython: 6.4.0
sphinx: 1.7.4
patsy: 0.5.0
dateutil: 2.7.3
pytz: 2018.4
blosc: None
bottleneck: 1.2.1
tables: 3.4.3
numexpr: 2.6.5
feather: None
matplotlib: 2.2.2
openpyxl: 2.5.3
xlrd: 1.1.0
xlwt: 1.3.0
xlsxwriter: 1.0.4
lxml: 4.2.1
bs4: 4.6.0
html5lib: 1.0.1
sqlalchemy: 1.2.7
pymysql: None
psycopg2: None
jinja2: 2.10
s3fs: None
fastparquet: None
pandas_gbq: None
pandas_datareader: None

</details>
