diff --git a/build_library/test_image_content.sh b/build_library/test_image_content.sh
index 1389e936a7..c624d4b7e2 100644
--- a/build_library/test_image_content.sh
+++ b/build_library/test_image_content.sh
@@ -5,32 +5,32 @@
 # Files that are known to conflict with /usr but are OK because they
 # are already fixed by toggling the symlink-usr USE flag.
 USR_CONFLICT_WHITELIST=(
-	/bin/awk
-	/bin/basename
-	/bin/chroot
-	/bin/cut
-	/bin/dir
-	/bin/dirname
-	/bin/du
-	/bin/env
-	/bin/expr
-	/bin/gawk
-	/bin/head
-	/bin/mkfifo
-	/bin/mktemp
-	/bin/passwd
-	/bin/readlink
-	/bin/seq
-	/bin/sleep
-	/bin/sort
-	/bin/tail
-	/bin/touch
-	/bin/tr
-	/bin/tty
-	/bin/uname
-	/bin/vdir
-	/bin/wc
-	/bin/yes
+    /bin/awk
+    /bin/basename
+    /bin/chroot
+    /bin/cut
+    /bin/dir
+    /bin/dirname
+    /bin/du
+    /bin/env
+    /bin/expr
+    /bin/gawk
+    /bin/head
+    /bin/mkfifo
+    /bin/mktemp
+    /bin/passwd
+    /bin/readlink
+    /bin/seq
+    /bin/sleep
+    /bin/sort
+    /bin/tail
+    /bin/touch
+    /bin/tr
+    /bin/tty
+    /bin/uname
+    /bin/vdir
+    /bin/wc
+    /bin/yes
 )
 
 test_image_content() {
@@ -100,8 +100,8 @@ test_image_content() {
       local whitelist
       for whitelist in "${USR_CONFLICT_WHITELIST[@]}"; do
         if [[ "${trimmed_path}" == "${whitelist}" ]]; then
-	  continue 2
-	fi
+          continue 2
+        fi
       done
       if [[ -e "${root_file}" || -h "${root_file}" ]]; then
         # TODO(marineam): make fatal before switching to symlinks