User-unfriendly error message that could be made simpler

[Avamander]

Arduino: 1.6.6 Hourly Build 2015/06/16 04:29 (Linux), Board: "Arduino Nano, ATmega328"

avrdude: ser_open(): can't open device "/dev/ttyUSB2": No such file or directory
ioctl("TIOCMGET"): Inappropriate ioctl for device

Could be just replaced with "Failed to find device at "/dev/ttyUSB2" ". Also, avrdude error message does not begin with a new line, it is printed on top of previous message .

[ffissore]

Actually, that error message may mean lots of different things and we can't change it so easily. As for the missing new line, it's caused by a buggy handling of the output we hope to fix for 1.6.6. Also see #2680 and #2798