SEATTLE -- At The Linux Foundation's Open Source Summit North America, Linus Torvalds and his good friend Dirk Hohndel, Verizon's Head of the Open Source Program Office, once more had a wide-ranging conversation about Linux development and related issues. Their chat started with briefly mentioning tabs vs. spaces in source code. No, seriously. In programming circles, this is a big deal. A developer had proposed replacing a tab with a space character to help Kconfig parsers read files. No, sorry,...