doc/gitmail-rc: fix whitespaces

Signed-off-by: Luka Perkov <luka.perkov@sartura.hr>

doc/git-mailrc

@@ -22,7 +22,7 @@ alias gruss          Graeme Russ <graeme.russ@gmail.com>
 alias hs             Heiko Schocher <hs@denx.de>
 alias ijc            Ian Campbell <ijc+uboot@hellion.org.uk>
 alias iwamatsu       Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
-alias jagan	     Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
+alias jagan          Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
 alias jasonjin       Jason Jin <jason.jin@freescale.com>
 alias jhersh         Joe Hershberger <joe.hershberger@gmail.com>
 alias jwrdegoede     Hans de Goede <hdegoede@redhat.com>
@@ -121,7 +121,7 @@ alias kconfig        uboot, masahiro
 alias mmc            uboot, panto
 alias nand           uboot, scottwood
 alias net            uboot, jhersh
-alias spi	     uboot, jagan
+alias spi            uboot, jagan
 alias ubi            uboot, hs
 alias usb            uboot, marex
 alias video          uboot, ag