BUG: Standardize malformed row handling in Python engine
Wrap `next(source)` when `source` is a file-buffer object to allow for more uniform error message displaying in the Python engine.  Closes #15910.
# [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/15913?src=pr&el=h1) Report
> Merging [#15913](https://codecov.io/gh/pandas-dev/pandas/pull/15913?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/ba30e3a2e376035549b009079d44ba5ca7a4c48f?src=pr&el=desc) will **increase** coverage by `<.01%`.
> The diff coverage is `95.65%`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/15913/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/15913?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #15913      +/-   ##
==========================================
+ Coverage   90.95%   90.96%   +<.01%     
==========================================
  Files         145      145              
  Lines       49534    49531       -3     
==========================================
- Hits        45056    45055       -1     
+ Misses       4478     4476       -2
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `88.72% <95.65%> (ø)` | :arrow_up: |
| #single | `40.63% <4.34%> (-0.03%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/15913?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/io/parsers.py](https://codecov.io/gh/pandas-dev/pandas/pull/15913?src=pr&el=tree#diff-cGFuZGFzL2lvL3BhcnNlcnMucHk=) | `95.65% <95.65%> (+0.12%)` | :arrow_up: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/15913?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/15913?src=pr&el=footer). Last update [ba30e3a...884387e](https://codecov.io/gh/pandas-dev/pandas/pull/15913?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments). @jreback : Everything is green and ready to go. thanks @gfyoung 