Update cppcheck integration test expected outputs

Removed one trailing newline from cppcheck error expected outputs
in integration tests to match shell command test expectations after
applying the checkers report filter.

Author: pocc

tests/table_tests_integration.json

@@ -454,7 +454,7 @@
       "{test_dir}/err.c"
     ],
     "args": [],
-    "expd_output": "cppcheck.................................................................Failed\n- hook id: cppcheck\n- exit code: 1\n\nerr.c:2:16: style: Unused variable: i [unusedVariable]\nint main(){int i;return;}\n               ^\n\n",
+    "expd_output": "cppcheck.................................................................Failed\n- hook id: cppcheck\n- exit code: 1\n\nerr.c:2:16: style: Unused variable: i [unusedVariable]\nint main(){int i;return;}\n               ^\n",
     "expd_retcode": 1
   },
   {
@@ -463,7 +463,7 @@
       "{test_dir}/err.cpp"
     ],
     "args": [],
-    "expd_output": "cppcheck.................................................................Failed\n- hook id: cppcheck\n- exit code: 1\n\nerr.cpp:2:16: style: Unused variable: i [unusedVariable]\nint main(){int i;return;}\n               ^\n\n",
+    "expd_output": "cppcheck.................................................................Failed\n- hook id: cppcheck\n- exit code: 1\n\nerr.cpp:2:16: style: Unused variable: i [unusedVariable]\nint main(){int i;return;}\n               ^\n",
     "expd_retcode": 1
   },
   {