Also perform change in error messages

Author: odersky

compiler/src/dotty/tools/dotc/core/TypeErrors.scala

@@ -117,7 +117,7 @@ extends TypeError:
     em"""Recursion limit exceeded.
         |Maybe there is an illegal cyclic reference?
         |If that's not the case, you could also try to increase the stacksize using the -Xss JVM option.
-        |For the unprocessed stack trace, compile with -Xno-decode-stacktraces.
+        |For the unprocessed stack trace, compile with Xno-enrich-error-messages.
         |A recurring operation is (inner to outer):
         |${opsString(mostCommon).stripMargin}"""
 

compiler/src/dotty/tools/dotc/core/tasty/TreePickler.scala

@@ -941,7 +941,7 @@ class TreePickler(pickler: TastyPickler, attributes: Attributes) {
           em"""Recursion limit exceeded while pickling ${ex.mdef}
               |in ${ex.mdef.symbol.showLocated}.
               |You could try to increase the stacksize using the -Xss JVM option.
-              |For the unprocessed stack trace, compile with -Xno-decode-stacktraces.""",
+              |For the unprocessed stack trace, compile with -Xno-enrich-error-messages.""",
           ex.mdef.srcPos)
 
     def missing = forwardSymRefs.keysIterator

tests/neg/i2887b.check

@@ -4,7 +4,7 @@
    |       Recursion limit exceeded.
    |       Maybe there is an illegal cyclic reference?
    |       If that's not the case, you could also try to increase the stacksize using the -Xss JVM option.
-   |       For the unprocessed stack trace, compile with -Xno-decode-stacktraces.
+   |       For the unprocessed stack trace, compile with Xno-enrich-error-messages.
    |       A recurring operation is (inner to outer):
    |
    |         try to instantiate Z[Z]