[Developer Tools] Cannot merge PRs from authors with "Á" (U+00C1) in their name

[asfimport]

I tried merging a PR from Ádám Lippai (https://github.com/alippai) and the merge script failed with:

 

./dev/merge_arrow_pr.py 
ARROW_HOME = /home/andy/git/andygrove/arrow/dev
PROJECT_NAME = arrow
Which pull request would you like to merge? (e.g. 34): 5499
Env APACHE_JIRA_USERNAME not set, please enter your JIRA username:andygrove
Env APACHE_JIRA_PASSWORD not set, please enter your JIRA password:*********
=== Pull Request #5499 ===
title	ARROW-6705: [Rust] [DataFusion] README has invalid github URL
source	alippai/patch-1
target	master
url	https://api.github.com/repos/apache/arrow/pulls/5499
=== JIRA ARROW-6705 ===
Summary		[Rust] [DataFusion] README has invalid github URL
Assignee	NOT ASSIGNED!!!
Components	Rust
Status		Open
URL		https://issues.apache.org/jira/browse/ARROW-6705Proceed with merging pull request #5499? (y/n): y
Switched to branch 'PR_TOOL_MERGE_PR_5499_MASTER'
Automatic merge went well; stopped before committing as requested
Traceback (most recent call last):
  File "./dev/merge_arrow_pr.py", line 571, in <module>
    cli()
  File "./dev/merge_arrow_pr.py", line 556, in cli
    pr.merge()
  File "./dev/merge_arrow_pr.py", line 354, in merge
    print("Author {}: {}".format(i + 1, author))
UnicodeEncodeError: 'ascii' codec can't encode character u'\xc1' in position 0: ordinal not in range(128)
 

Reporter: Andy Grove / @andygrove
Assignee: Andy Grove / @andygrove

_{Note: This issue was originally created as ARROW-6706. Please see the migration documentation for further details.}

[asfimport]

Antoine Pitrou / @pitrou:
Are you using Python 2 or Python 3? If the former, try Python 3.

[asfimport]

Andy Grove / @andygrove:
Thanks Antoine. Using python3 fixed it.

[asfimport]

Wes McKinney / @wesm:
If we werent bidding farewell to Python 2 in 3 months I would say to fix it but at this point not worth it

[asfimport]

Neal Richardson / @nealrichardson:
Can we fail explicitly if someone uses Python 2 and tell them to use Python 3?

[asfimport]

Antoine Pitrou / @pitrou:
Probably :-)