Update git config: add a new fancy alias for git-log and replace tabs by spaces.

.gitconfig

@@ -1,24 +1,24 @@
 [user]
-	name=Emmanuel Bouthenot
-	email=kolter@openics.org
+    name=Emmanuel Bouthenot
+    email=kolter@openics.org
 
 [alias]
-	br = branch
-	st = status
-	rlog = log --pretty=format:\"%h %Cblue%cr%Creset %cn %Cgreen%s%Creset\"
+    br = branch
+    st = status
+    l = log --graph --decorate --pretty=format:\"%h %C(magenta)%ci%Creset%C(yellow)%d %Creset%s %C(cyan)%cn <%cE>\"
 
 [color]
-	ui = auto
-	pager = true
+    ui = auto
+    pager = true
 
 [color "diff"]
-	meta = green
-	frag = yellow
-	old = magenta
-	new = cyan
+    meta = green
+    frag = yellow
+    old = magenta
+    new = cyan
 
 [color "status"]
-	header = bold blue
-	added  = green
-	changed = bold red
-	untracked = bold yellow
+    header = bold blue
+    added  = green
+    changed = bold red
+    untracked = bold yellow