WRONG_INDENTATION false-positive: "the same number of indents to the opening and closing quotes was expected"

[petertrr]

Describe the bug

I believe, caused by 998d0e9

Observed behavior

https://github.com/saveourtool/save-cli/security/code-scanning/132
https://github.com/saveourtool/save-cli/security/code-scanning/131
Reproducible on diktat-demo with this snippet:

package com.saveourtool.save.reporter.plain

open class PlainTextReporter {
    @Suppress("MAGIC_NUMBER", "MagicNumber")
    override fun afterAll() {
        out.write(
            "$status: $total tests, $passRate%% successful, failed: $failed, skipped: $skipped"
                .encodeToByteArray()
            )
    }
}

Environment information

• diktat version: 1.2.3

[0x6675636b796f75676974687562]

Originally from [saveourtool/save-cli/security/code-scanning/131] (https://github.com/saveourtool/save-cli/security/code-scanning/131), caused by 998d0e9 as a part of #811/#1364.

The offending fragment is in IndentationRule.kt:248:

            val warnText = if (!difOffsetCloseAndOpenQuote) {
                "the same number of indents to the opening and closing quotes was expected"
            } else {
                "expected $expectedIndent but was ${indentError.actual}"
            }

The minimal repro is

val v = f(
    "text $variable text".isEmpty()
)

Analysis

1. The sting template should contain an interpolated reference (a SHORT_STRING_TEMPLATE_ENTRY) in the middle of it, i. e. preceded and followed with non-reference text (LITERAL_STRING_TEMPLATE_ENTRY).
2. The string template should be followed with a dot-qualified (but not a safe-access!) expression.