Fix warning message in `WRONG_INDENTATION`

[nulls]

What's done:

• added a workaround to change warn message
• added a test for it

It closes #1886

[github-actions[bot]]

JUnit Tests (macOS, EnricoMi/publish-unit-test-result-action@v2)

   166 files  ±0     166 suites  ±0   4m 1s :stopwatch: - 3m 54s 1 433 tests +1  1 395 :heavy_check_mark: +1  38 :zzz: ±0  0 :x: ±0  2 813 runs  +2  2 775 :heavy_check_mark: +2  38 :zzz: ±0  0 :x: ±0 

Results for commit 99e35adb. ± Comparison against base commit 46ec9b91.

:recycle: This comment has been updated with latest results.

[codecov[bot]]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (46ec9b9) 78.29% compared to head (99e35ad) 78.28%.

Files	Patch %	Lines
...at/ruleset/rules/chapter3/files/IndentationRule.kt	25.00%	0 Missing and 3 partials :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1888 +/- ## ============================================ - Coverage 78.29% 78.28% -0.02% - Complexity 2469 2471 +2 ============================================ Files 134 134 Lines 8704 8712 +8 Branches 2206 2210 +4 ============================================ + Hits 6815 6820 +5 Misses 905 905 - Partials 984 987 +3 ```

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[github-actions[bot]]

JUnit Tests (Windows, EnricoMi/publish-unit-test-result-action@v2)

   166 files  ±0     166 suites  ±0   7m 16s :stopwatch: -11s 1 433 tests +1  1 416 :heavy_check_mark: +1  17 :zzz: ±0  0 :x: ±0  2 813 runs  +2  2 796 :heavy_check_mark: +2  17 :zzz: ±0  0 :x: ±0 

Results for commit 99e35adb. ± Comparison against base commit 46ec9b91.

:recycle: This comment has been updated with latest results.