[Pharo-dev] Test and Patch for writeStream error

Hi, I stumbled on an error in WriteStream>>ensureEndsWith: method. The error caused extra blank lines in logs. Attached small changeset fixes it. It also adds a test to catch such errors in the future. With this fix, ./pharo generator.image PharoVMSpur32Builder buildUnix32 gives a compact output without extra blank lines. To which box in which repo should I save this cs for mainlining it? Regards .. Subbu