Update compiler/src/dotty/tools/dotc/reporting/messages.scala

Co-authored-by: Fengyun Liu <[email protected]>

Author: nicolasstucki

compiler/src/dotty/tools/dotc/reporting/messages.scala

@@ -528,7 +528,7 @@ import ast.tpd
            |Only fields can be left uninitialized in this manner; local variables
            |must be initialized.
            |
-           |Another occurrence for this error is defining a val with self type.
+           |Another occurrence for this error is self type definition.
            |The ${hl("_")} can be replaced with ${hl("this")}.
            |
            |Example before:
@@ -2422,4 +2422,4 @@ import ast.tpd
                    |The variable does not occur in the signature of ${hl(owner)}.
                    |""".stripMargin
     def explain = ""
-  }
+  }