Fix closure_end_indentation corrupting CRLF files

[HttpGetBinary]

Fixes #6598

What's wrong

swiftlint --fix on a CRLF file moves closing braces to wrong positions, corrupting it.

Why

Two bugs in ClosureEndIndentationRule:

1. getFirstNonWhitespaceColumn reads line content including a trailing \r on CRLF files, skewing column distance calculations.
2. The correction hardcodes "\n" when inserting a newline, breaking files that use "\r\n".

Fix

1. Strip \r from line content before measuring indentation.
2. Detect the file's line ending and use it when inserting newlines in corrections.

[SwiftLintBot]

	19 Messages
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