Eliminate stdostream (finally, that was awful.)

luprex/cpp/core/printbuffer.hpp

@@ -149,7 +149,7 @@ public:
     // Reset the print channeler.
     void reset() { line_ = 0; }
     
-    // Copy any new lines from the printbuffer to the stdostream.
+    // Copy any new lines from the printbuffer to the stream buffer.
     // Update the current line number.  Return true if the printbuffer
     // contains any lines that have already been channeled.
     bool channel(const PrintBuffer *pb, StreamBuffer *sb);