[BUG] Have consistent line number indentation for the whole suggested edit

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Edge case (and only "nice to have"): suggested edits may indent the actual code with different amount of space. The reason is the different length of displayed line numbers. At the screenshot, the indentation is increased by 1 space between lines, 89 and 91. The 91 has more indentation to align correctly with a later 100.

This visually disturbs how code is displayed above and below the "gap".

<img width="433" height="549" alt="Image" src="https://github.com/user-attachments/assets/ad6d972d-a45c-40ef-83f9-76c66002cf93" />

What Should Happen?

The code should be aligned vertically independent from whether the line numbering takes more space for different sections of displayed code.

A solution would consider only the last line number of all displayed sections for the line numbering/indentation of all code blocks.

Error Messages/Logs

Steps to Reproduce

1. Create an original file.

cat formatter.rb:

class Formatter
  def self.format(value)
    value.to_s.strip
  end

  def self.truncate(value, length)
    return value if value.length <= length

    value[0, length] + "..."
  end

  def self.titleize(value)
    value.split(" ").map(&:capitalize).join(" ")
  end
end

1. Ask claude to edit the file which results in diffs in sections before and after a 10**n line number

in `formatter.rb`, please `.downcase` the result. Additionally, rename `titleize` to `title_case`. Perform both changes with a single edit. 

1. The Update is displayed like this:

<img width="757" height="612" alt="Image" src="https://github.com/user-attachments/assets/d4d07ef1-ea6c-4e6b-82b1-87188f927fd1" />

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Claude Code Version

2.1.187

Platform

AWS Bedrock

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)