testament: error instead of silently overwrite a spec (#16166)

tests/casestmt/tcaseexpr1.nim

@@ -1,17 +1,23 @@
 discard """
-  errormsg: "type mismatch: got <string> but expected 'int'"
-  line: 33
-  file: "tcaseexpr1.nim"
-
-  errormsg: "not all cases are covered; missing: {C}"
-  line: 27
-  file: "tcaseexpr1.nim"
+  cmd: "nim check $options $file"
+  action: "reject"
+  nimout: '''
+tcaseexpr1.nim(33, 10) Error: not all cases are covered; missing: {C}
+'''
 """
 
-# NOTE: This spec is wrong. Spec doesn't support multiple error
-# messages. The first one is simply overridden by the second one.
-# This just has never been noticed.
+#[
+# xxx make nimout comparison use nimoutCheck instead of:
+elif expected.nimout.len > 0 and expected.nimout.normalizeMsg notin given.nimout.normalizeMsg:
 
+and then use nimout: '''
+tcaseexpr1.nim(33, 10) Error: not all cases are covered2; missing: {C}
+tcaseexpr1.nim(39, 12) Error: type mismatch: got <string> but expected 'int literal(10)'
+'''
+]#
+
+
+# line 20
 type
   E = enum A, B, C
 

tests/exception/t13115.nim

@@ -2,12 +2,11 @@ discard """
   exitcode: 1
   targets: "c"
   matrix: "-d:debug; -d:release"
-  outputsub: '''t13115.nim(13)           t13115
-Error: unhandled exception: This char is'''
   outputsub: ''' and works fine! [Exception]'''
 """
 
-const b_null: char = 0.char
-var msg = "This char is `" & $b_null & "` and works fine!"
+# bug #13115
+# xxx bug: doesn't yet work for cpp
 
-raise newException(Exception, msg)
+var msg = "This char is `" & '\0' & "` and works fine!"
+raise newException(Exception, msg)

tests/generics/tmetafield.nim

@@ -1,10 +1,23 @@
 discard """
   cmd: "nim check $options $file"
-  errormsg: "'proc' is not a concrete type"
-  errormsg: "'Foo' is not a concrete type."
-  errormsg: "invalid type: 'proc' in this context: 'TBaseMed'"
+  action: "reject"
+  nimout: '''
+tmetafield.nim(26, 5) Error: 'proc' is not a concrete type; for a callback without parameters use 'proc()'
+tmetafield.nim(27, 5) Error: 'Foo' is not a concrete type
+tmetafield.nim(29, 5) Error: invalid type: 'proc' in this context: 'TBaseMed' for var
+'''
 """
 
+# bug #188
+
+
+
+
+
+
+
+
+# line 20
 type
   Foo[T] = object
     x: T
@@ -15,4 +28,3 @@ type
 
 var a: TBaseMed
 
-# issue 188