try to debug semanticdb

Author: hamzaremmal

compiler/test/dotty/tools/dotc/semanticdb/SemanticdbTests.scala

@@ -22,7 +22,7 @@ import org.junit.experimental.categories.Category
 import dotty.BootstrappedOnlyTests
 import dotty.tools.dotc.Main
 import dotty.tools.dotc.semanticdb.Scala3.given
-import dotty.tools.dotc.util.SourceFile
+import dotty.tools.dotc.util.{SourceFile, DiffUtil}
 
 @main def updateExpect =
   SemanticdbTests().runExpectTest(updateExpectFiles = true)
@@ -77,6 +77,7 @@ class SemanticdbTests:
         val expectName = expectPath.getFileName
         val relExpect = rootSrc.relativize(expectPath)
         if expected.trim != obtained.trim then
+          println(DiffUtil.mkColoredLineDiff(obtained.trim().linesIterator.toSeq, expected.trim().linesIterator.toSeq))
           Files.write(expectPath.resolveSibling("" + expectName + ".out"), obtained.getBytes(StandardCharsets.UTF_8))
           errors += expectPath
     for source <- inputFiles().sorted do