Fix 372347 - Replacement problem of the additional c++14/c++17 new and delete operators

Fix 372347 - Replacement problem of the additional c++14/c++17 new and delete operators

Patch by Paul Floyd, with comments slightly updated.

At the same time, cleanup of the trailing whitespaces in the whole file.

memcheck/tests/mismatches now shows the 'operator delete(void*, unsigned long)'
in the stacktrace, so updated the test expected output.