BUG:Dataframe.to_string, when set index=False, there is a white space in the head of every line

[ZephyrShannon]

• I have checked that this issue has not already been reported.

• I have confirmed this bug exists on the latest version of pandas.

• (optional) I have confirmed this bug exists on the master branch of pandas.

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Note: Please read this guide detailing how to provide the necessary information for us to reproduce your bug.

Code Sample, a copy-pastable example

import pandas as pd
d = {'col1': ["1", "2", "3"], 'col2': [4, 5, 6]}
df = pd.DataFrame(d)
print(df.to_string(index=False, formatters={'col1':'{:10}'.format}))

Problem description

there is a white space in the head of every line:
col1 col2
1 4
2 5
3 6

Expected Output

no white space in the head
col1 col2
1 4
2 5
3 6

Output of pd.show_versions()

INSTALLED VERSIONS ------------------ commit: None python: 3.7.3.final.0 python-bits: 64 OS: Darwin OS-release: 19.5.0 machine: x86_64 processor: i386 byteorder: little LC_ALL: None LANG: None LOCALE: zh_CN.UTF-8 pandas: 0.24.2 pytest: None pip: 19.0.3 setuptools: 41.0.0 Cython: None numpy: 1.16.4 scipy: 1.3.0 pyarrow: None xarray: None IPython: 7.5.0 sphinx: None patsy: None dateutil: 2.8.0 pytz: 2019.1 blosc: None bottleneck: None tables: None numexpr: None feather: None matplotlib: 3.1.0 openpyxl: None xlrd: None xlwt: None xlsxwriter: None lxml.etree: 4.5.1 bs4: None html5lib: None sqlalchemy: None pymysql: None psycopg2: None jinja2: 2.10.1 s3fs: None fastparquet: None pandas_gbq: None pandas_datareader: 0.8.1 gcsfs: None

[linchiwei123]

try this. documentation

print(df.to_string(index=False, formatters={'col1':'{:10}'.format}, justify="left"))

[TomAugspurger]

Duplicate of #24980 I think.