RULE-21-6: Simplify alert msg, remove std headers

Author: lcartey

c/misra/src/rules/RULE-21-6/StandardLibraryInputoutputFunctionsUsed.ql

@@ -49,4 +49,4 @@ where
     f.getName() = wcharInputOutput() and
     f.getFile().getBaseName() = "wchar.h"
   )
-select fc, "Call to banned function $@.", f, f.getName()
+select fc, "Call to banned function " + f.getName() + "."

c/misra/test/rules/RULE-21-6/StandardLibraryInputoutputFunctionsUsed.expected

@@ -1,7 +1,7 @@
-| test.c:8:10:8:14 | call to scanf | Call to banned function $@. | stdio.h:117:5:117:9 | scanf | scanf |
-| test.c:9:5:9:10 | call to printf | Call to banned function $@. | stdio.h:107:5:107:10 | printf | printf |
-| test.c:16:16:16:21 | call to fgetwc | Call to banned function $@. | wchar.h:125:8:125:13 | fgetwc | fgetwc |
-| test.c:17:5:17:12 | call to putwchar | Call to banned function $@. | wchar.h:131:8:131:15 | putwchar | putwchar |
-| test.c:22:7:22:10 | call to puts | Call to banned function $@. | stdio.h:105:5:105:8 | puts | puts |
-| test.c:24:7:24:10 | call to puts | Call to banned function $@. | stdio.h:105:5:105:8 | puts | puts |
-| test.c:26:5:26:8 | call to puts | Call to banned function $@. | stdio.h:105:5:105:8 | puts | puts |
+| test.c:8:10:8:14 | call to scanf | Call to banned function scanf. |
+| test.c:9:5:9:10 | call to printf | Call to banned function printf. |
+| test.c:16:16:16:21 | call to fgetwc | Call to banned function fgetwc. |
+| test.c:17:5:17:12 | call to putwchar | Call to banned function putwchar. |
+| test.c:22:7:22:10 | call to puts | Call to banned function puts. |
+| test.c:24:7:24:10 | call to puts | Call to banned function puts. |
+| test.c:26:5:26:8 | call to puts | Call to banned function puts. |

c/misra/test/rules/RULE-21-6/stdio.h

@@ -1,8 +1,8 @@
-#include "stdio.h"
-#include "wchar.h"
 #include <errno.h>
 #include <locale.h>
+#include <stdio.h>
 #include <stdlib.h>
+#include <wchar.h>
 void f1() {
   int n;
   while (scanf("%d", &n) == 1) // NON_COMPLIANT