Changing indentation of multiline string works incorrect

[kgevorkyan]

Describe the bug

Initial code:

    fun `check dummy property`() {
        lintMethod(
                """
                    |// provide your check here
                """.trimMargin(),
                LintError(1, 1, ruleId, "${DUMMY_TEST_WARNING.warnText()} some detailed explanation", true)
        )
    }

Problem: There are extra indentations in lintMethod.

Expected behavior after command mvn diktat:fix@diktat:

    fun `check dummy property`() {
        lintMethod(
            """
                |// provide your check here
            """.trimMargin(),
            LintError(1, 1, ruleId, "${DUMMY_TEST_WARNING.warnText()} some detailed explanation", true)
        )
    }

Observed behavior

    fun `check dummy property`() {
        lintMethod(
            """
                    |// provide your check here
                """.trimMargin(),
            LintError(1, 1, ruleId, "${DUMMY_TEST_WARNING.warnText()} some detailed explanation", true)
        )
    }

So only first and last lines were changed.

Environment information

• diktat version: 0.4.2
• build tool (maven/gradle): maven
• kotlin version: 1.4.31

[Arrgentum]

Some part of the error has already been fixed.

Environment information

• diktat version: 1.1.0
• DiktatSmokeTest - fix mode
• kotlin version: 1.6

Test1

Initial code №1:

fun `check dummy property`() {
    lintMethod(
                """
                            |// provide your check here
                        """.trimMargin(),
                LintError(1, 1, ruleId, "${DUMMY_TEST_WARNING.warnText()} some detailed explanation", true)
    )
}

Observed behavior №1:

fun `check dummy property`() {
    lintMethod(
        """
                    |// provide your check here
        """.trimMargin(),
        LintError(1, 1, ruleId, "${DUMMY_TEST_WARNING.warnText()} some detailed explanation", true)
    )
}

Test2

Initial code №2:

fun `check dummy property`() {
    lintMethod(
                """
                            |// provide your check here
                """.trimMargin(),
                LintError(1, 1, ruleId, "${DUMMY_TEST_WARNING.warnText()} some detailed explanation", true)
    )
}

Observed behavior №2:

fun `check dummy property`() {
    lintMethod(
        """
                    |// provide your check here
        """.trimMargin(),
        LintError(1, 1, ruleId, "${DUMMY_TEST_WARNING.warnText()} some detailed explanation", true)
    )
}

Test3

Initial code №3:

fun `check dummy property`() {
    lintMethod(
        """
                                    |// provide your check here
                        """.trimMargin(),
        LintError(1, 1, ruleId, "${DUMMY_TEST_WARNING.warnText()} some detailed explanation", true)
    )
}

Observed behavior №3:

fun `check dummy property`() {
    lintMethod(
        """
                                    |// provide your check here
                        """.trimMargin(),
                        LintError(1, 1, ruleId, "${DUMMY_TEST_WARNING.warnText()} some detailed explanation", true)
    )
}

Expected behavior №3:

fun `check dummy property`() {
    lintMethod(
        """
                    |// provide your check here
        """.trimMargin(),
        LintError(1, 1, ruleId, "${DUMMY_TEST_WARNING.warnText()} some detailed explanation", true)
    )
}

Test4

Initial code №4 (extracted into a separate gh-1347):

fun checkScript() {
    lintMethod(
            """
                        |val A = "aa"
                    """.trimMargin(),
    )
}

Observed behavior №4:

fun checkScript() {
    lintMethod(
        """
                    |val A =            "            aa            "
        """.trimMargin(),
    )
}

Expected behavior №4:

fun checkScript() {
    lintMethod(
        """
                    |val A = "aa"
        """.trimMargin(),
    )
}

Result

Testing showed that in the first two tests, the expected behavior coincides with the result obtained. And in the last two tests, no.
This is due to checking only the beginning of a multiline string and its indentation.
Test error 4 has not been detected yet (07.06.2022 12:04). But checking this test in IndentationRuleFixTest give the same result