suggestion: filenames output

[Jascha Wetzel]

yeah, there is some bug with procedure demangling sitting around for a
while. i'll look into it.

bobef wrote:
> In the following example there is no telling which is filename and which is something else, because there are spaces in what (I think) is supposed to be a function name:
> 
> Unhandled Exception: EXCEPTION_ACCESS_VIOLATION(0xc0000005) at MFC3dwt7widgets5event5EventZv plugins.flowerui.FlowerUI.uilisten.handleEvent plugins\flowerui.d:42 (0x004341ab)
> 
> So I think it will be a good idea to separate the filename with something that does not occur in both functions and filenames like asterix or something.