Fix: while() reports an error the same way as if()

With arguments list expanded.

Source/cmWhileCommand.cxx

@@ -16,6 +16,7 @@
 #include "cmListFileCache.h"
 #include "cmMakefile.h"
 #include "cmMessageType.h"
+#include "cmOutputConverter.h"
 #include "cmSystemTools.h"
 #include "cmake.h"
 
@@ -100,16 +101,13 @@ bool cmWhileFunctionBlocker::Replay(std::vector<cmListFileFunction> functions,
   }
 
   if (!isTrue && !errorString.empty()) {
-    std::string err = "had incorrect arguments: ";
-    for (cmListFileArgument const& arg : this->Args) {
-      err += (arg.Delim ? "\"" : "");
-      err += arg.Value;
-      err += (arg.Delim ? "\"" : "");
+    std::string err = "had incorrect arguments:\n ";
+    for (cmExpandedCommandArgument const& i : expandedArguments) {
       err += " ";
+      err += cmOutputConverter::EscapeForCMake(i.GetValue());
     }
-    err += "(";
+    err += "\n";
     err += errorString;
-    err += ").";
     mf.GetCMakeInstance()->IssueMessage(messageType, err, whileBT);
     if (messageType == MessageType::FATAL_ERROR) {
       cmSystemTools::SetFatalErrorOccured();

Tests/RunCMake/while/unbalanced-parenthesis-stderr.txt

@@ -1,5 +1,8 @@
 CMake Error at unbalanced-parenthesis.cmake:[0-9]+ \(while\):
-  had incorrect arguments: NOT \$\{var_with_paren\} IN_LIST some_list
-  \(mismatched parenthesis in condition\).
+  had incorrect arguments:
+
+    "NOT" "\(" "IN_LIST" "some_list"
+
+  mismatched parenthesis in condition
 Call Stack \(most recent call first\):
   CMakeLists\.txt:[0-9]+ \(include\)