[SR-15529] swift-format increases indent of multi-line string literals when using tabs for indentation

[saagarjha]

Previous ID	SR-15529
Radar	None
Original Reporter	@saagarjha
Type	Bug

Environment

.swift-format:

{
    "indentation": {
        "tabs": 1
    },
}

$ swift-format -v
0.50500.0

Additional Detail from JIRA

Votes	0
Component/s	swift-format
Labels	Bug
Assignee	None
Priority	Medium

md5: 59a5b2a30254b00568ce72e4b59f40db

Issue Description:

On this code (Note, the indentation is a literal tab)

let string = """
    Hello, this is a test string. \
    Here's another line.
    """

I'd expect this to be idempotent, but swift-format increases the indentation each time it runs:

let string = """
        Hello, this is a test string. \
        Here's another line.
        """

[matej-io]

I have the same issue, I use VSCode and I have set format on save, so each time I save the swift file with the multi-line string it increases the indent by 1 tab.

[miku1958]

Same issue, please fix it! thanks

[hi-kumar]

I made a local fix (+unit test) for this issue on top of the 508.0.0 release, but when I was trying to prepare a pull request I noticed this issue doesn't repro on main branch anymore. So, I guess we just wait for the next full release.

[ahoppen]

Tracked in Apple’s issue tracker as rdar://126948240