diff --git a/t/lib-read-tree-m-3way.sh b/t/lib-read-tree-m-3way.sh
index 3c17cb7f80..2da25b3144 100644
--- a/t/lib-read-tree-m-3way.sh
+++ b/t/lib-read-tree-m-3way.sh
@@ -3,9 +3,9 @@
 mkdir Z
 for a in N D M
 do
-    for b in N D M
-    do
-        p=$a$b
+	for b in N D M
+	do
+		p=$a$b
 	echo This is $p from the original tree. >$p
 	echo This is Z/$p from the original tree. >Z/$p
 	test_expect_success "adding test file $p and Z/$p" '
@@ -16,7 +16,7 @@ do
 done
 echo This is SS from the original tree. >SS
 test_expect_success 'adding test file SS' '
-    git update-index --add SS
+	git update-index --add SS
 '
 cat >TT <<\EOF
 This is a trivial merge sample text.
@@ -31,10 +31,10 @@ the word, expected to be upcased by Branch B.
 This concludes the trivial merge sample file.
 EOF
 test_expect_success 'adding test file TT' '
-    git update-index --add TT
+	git update-index --add TT
 '
 test_expect_success 'prepare initial tree' '
-    tree_O=$(git write-tree)
+	tree_O=$(git write-tree)
 '
 
 ################################################################
@@ -46,46 +46,46 @@ test_expect_success 'prepare initial tree' '
 to_remove=$(echo D? Z/D?)
 rm -f $to_remove
 test_expect_success 'change in branch A (removal)' '
-    git update-index --remove $to_remove
+	git update-index --remove $to_remove
 '
 
 for p in M? Z/M?
 do
-    echo This is modified $p in the branch A. >$p
-    test_expect_success 'change in branch A (modification)' '
-        git update-index $p
-    '
+	echo This is modified $p in the branch A. >$p
+	test_expect_success 'change in branch A (modification)' '
+		git update-index $p
+	'
 done
 
 for p in AN AA Z/AN Z/AA
 do
-    echo This is added $p in the branch A. >$p
-    test_expect_success 'change in branch A (addition)' '
-	    git update-index --add $p
-    '
+	echo This is added $p in the branch A. >$p
+	test_expect_success 'change in branch A (addition)' '
+		git update-index --add $p
+	'
 done
 
 echo This is SS from the modified tree. >SS
 echo This is LL from the modified tree. >LL
 test_expect_success 'change in branch A (addition)' '
-    git update-index --add LL &&
-    git update-index SS
+	git update-index --add LL &&
+	git update-index SS
 '
 mv TT TT-
 sed -e '/Branch A/s/word/WORD/g' <TT- >TT
 rm -f TT-
 test_expect_success 'change in branch A (edit)' '
-    git update-index TT
+	git update-index TT
 '
 
 mkdir DF
 echo Branch A makes a file at DF/DF, creating a directory DF. >DF/DF
 test_expect_success 'change in branch A (change file to directory)' '
-    git update-index --add DF/DF
+	git update-index --add DF/DF
 '
 
 test_expect_success 'recording branch A tree' '
-    tree_A=$(git write-tree)
+	tree_A=$(git write-tree)
 '
 
 ################################################################
@@ -95,64 +95,64 @@ test_expect_success 'recording branch A tree' '
 rm -rf [NDMASLT][NDMASLT] Z DF
 mkdir Z
 test_expect_success 'reading original tree and checking out' '
-    git read-tree $tree_O &&
-    git checkout-index -a
+	git read-tree $tree_O &&
+	git checkout-index -a
 '
 
 to_remove=$(echo ?D Z/?D)
 rm -f $to_remove
 test_expect_success 'change in branch B (removal)' '
-    git update-index --remove $to_remove
+	git update-index --remove $to_remove
 '
 
 for p in ?M Z/?M
 do
-    echo This is modified $p in the branch B. >$p
-    test_expect_success 'change in branch B (modification)' '
-	    git update-index $p
-    '
+	echo This is modified $p in the branch B. >$p
+	test_expect_success 'change in branch B (modification)' '
+		git update-index $p
+	'
 done
 
 for p in NA AA Z/NA Z/AA
 do
-    echo This is added $p in the branch B. >$p
-    test_expect_success 'change in branch B (addition)' '
-	    git update-index --add $p
-    '
+	echo This is added $p in the branch B. >$p
+	test_expect_success 'change in branch B (addition)' '
+		git update-index --add $p
+	'
 done
 echo This is SS from the modified tree. >SS
 echo This is LL from the modified tree. >LL
 test_expect_success 'change in branch B (addition and modification)' '
-    git update-index --add LL &&
-    git update-index SS
+	git update-index --add LL &&
+	git update-index SS
 '
 mv TT TT-
 sed -e '/Branch B/s/word/WORD/g' <TT- >TT
 rm -f TT-
 test_expect_success 'change in branch B (modification)' '
-    git update-index TT
+	git update-index TT
 '
 
 echo Branch B makes a file at DF. >DF
 test_expect_success 'change in branch B (addition of a file to conflict with directory)' '
-    git update-index --add DF
+	git update-index --add DF
 '
 
 test_expect_success 'recording branch B tree' '
-    tree_B=$(git write-tree)
+	tree_B=$(git write-tree)
 '
 
 test_expect_success 'keep contents of 3 trees for easy access' '
-    rm -f .git/index &&
-    git read-tree $tree_O &&
-    mkdir .orig-O &&
-    git checkout-index --prefix=.orig-O/ -f -q -a &&
-    rm -f .git/index &&
-    git read-tree $tree_A &&
-    mkdir .orig-A &&
-    git checkout-index --prefix=.orig-A/ -f -q -a &&
-    rm -f .git/index &&
-    git read-tree $tree_B &&
-    mkdir .orig-B &&
-    git checkout-index --prefix=.orig-B/ -f -q -a
+	rm -f .git/index &&
+	git read-tree $tree_O &&
+	mkdir .orig-O &&
+	git checkout-index --prefix=.orig-O/ -f -q -a &&
+	rm -f .git/index &&
+	git read-tree $tree_A &&
+	mkdir .orig-A &&
+	git checkout-index --prefix=.orig-A/ -f -q -a &&
+	rm -f .git/index &&
+	git read-tree $tree_B &&
+	mkdir .orig-B &&
+	git checkout-index --prefix=.orig-B/ -f -q -a
 '
