alembic.util.messaging.msg does not properly wrap at terminal width

[saifelse]

Describe the bug
When alembic prints longs messages to stdout, it attempts to wrap messages at the terminal width.
However, it wraps 2 characters wider than the message.

Expected behavior
Messages should properly wrap at the width of the terminal.

To Reproduce
In a fairly narrow terminal window (e.g. 64 columns wide), run:

python -c 'from alembic.util.messaging import msg; msg("A" * 500)'

Output:

  AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AA
  AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AA
  AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AA
  AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AA
  AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AA
  AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AA
  AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AA
  AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

Expected:

  AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
  AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
  AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
  AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
  AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
  AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
  AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
  AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
  AAAA

Versions.

• OS: macOS 14.1.2
• Python: 3.11.6
• Alembic: 1.13.1
• SQLAlchemy: N/A
• Database: N/A
• DBAPI: N/A

Additional context
Fun fact: this bug was introduced all the way back in d4fea1d!
The message is wrapped at the terminal width, but then two spaces are prepended to every line.

Have a nice day!

[CaselIT]

Hi,

Thanks for reporting and for the PR!

[sqla-tester]

Saif Hakim has proposed a fix for this issue in the main branch:

fix alembic.util.messaging.msg to properly wrap at terminal width https://gerrit.sqlalchemy.org/c/sqlalchemy/alembic/+/5082