xbmk: general code cleanup

make the code much easier to read

i also cleaned up the recent git identity check

Signed-off-by: Leah Rowe <leah@libreboot.org>

include/mrc.sh

@@ -19,6 +19,7 @@ extract_refcode()
 	# cbfstool from coreboot 4.11_branch, the tree used by ASUS KGPE-D16:
 
 	if [ -z "$cbfstoolref" ]; then
+
 		err "cbfstoolref not set" "extract_refcode" "$@"
 	fi
 
@@ -27,8 +28,10 @@ extract_refcode()
 	x_ "$cbfstoolref" "$appdir/bios.bin" extract \
 	    -m x86 -n fallback/refcode -f "$appdir/ref" -r RO_SECTION
 
-	# enable the Intel GbE device, if told by offset MRC_refcode_gbe
+	# enable the Intel GbE device, if told by offset MRC_refcode_gbe:
+
 	if [ -n "$MRC_refcode_gbe" ]; then
+
 		x_ dd if="config/ifd/hp820g2/1.bin" of="$appdir/ref" bs=1 \
 		    seek=$MRC_refcode_gbe count=1 conv=notrunc; :
 	fi
@@ -39,8 +42,11 @@ extract_refcode()
 extract_mrc()
 {
 	if [ -z "$MRC_board" ]; then
+
 		err "MRC_board unset" "extract_mrc" "$@"
+
 	elif [ -z "$CONFIG_MRC_FILE" ]; then
+
 		err "CONFIG_MRC_FILE unset" "extract_mrc" "$@"
 	fi
 
@@ -48,6 +54,7 @@ extract_mrc()
 
 	(
 		x_ cd "$appdir"
+
 		extract_partition "${MRC_url##*/}"
 		extract_archive "$SHELLBALL" .