ScannerTokens: add RegionLine if indented further #4291

Job	Run time
Windows tests	3m 45s
testLatestScala (JVM, 2.12.19, 8)	3m 23s
testOlderScalaOnJVM (2.11.12)	3m 42s
testLatestScala (JVM, 2.12.19, 21)	3m 37s
++2.13.13 download-scala-library testsJVM/slow:test	3m 38s
testOlderScalaOnJVM (2.12.16)	3m 18s
testLatestScala (JVM, 2.13.13, 8)	3m 7s
communitytest/test	5m 12s
testOlderScalaOnJVM (2.12.17)	3m 0s
testLatestScala (JVM, 2.13.13, 21)	3m 8s
mima	5m 35s
testOlderScalaOnJVM (2.12.18)	2m 47s
testLatestScala (JS, 2.12.19, 8)	3m 50s
testOlderScalaOnJVM (2.13.10)	3m 30s
testLatestScala (JS, 2.12.19, 21)	3m 44s
testOlderScalaOnJVM (2.13.11)	3m 16s
Scalafmt	25s
testLatestScala (JS, 2.13.13, 8)	3m 31s
testLatestScala (JS, 2.13.13, 21)	3m 45s
testOlderScalaOnJVM (2.13.12)	3m 2s
testLatestScala (Native, 2.12.19, 8)	4m 9s
testLatestScala (Native, 2.12.19, 21)	4m 0s
testLatestScala (Native, 2.13.13, 8)	4m 9s
testLatestScala (Native, 2.13.13, 21)	4m 10s
	1h 25m 43s

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