diff --git a/would-reformat.sh b/would-reformat.sh
index 9f9f307..ce1e106 100755
--- a/would-reformat.sh
+++ b/would-reformat.sh
@@ -68,7 +68,7 @@ elif [[ $file_type == "dart" ]] ; then
     # probably others too :(
     syntax_error_retval=65
 
-    out=$(dart format -o none --set-exit-if-changed $file)
+    out=$(dart format -o none --set-exit-if-changed "$file")
     exitval="$?"
     retval="$exitval"
 else
@@ -77,13 +77,13 @@ else
 
 fi
 
-if [[ x"$retval" == x"$success_retval" ]]; then
+if [[ "$retval" == "$success_retval" ]]; then
     echo -n "would not change"
     exit 0
-elif [[ x"$retval" == x"$would_reformat_retval" ]]; then
+elif [[ "$retval" == "$would_reformat_retval" ]]; then
     echo -n "would change"
     exit 1
-elif [[ x"$retval" == x"$syntax_error_retval" ]]; then
+elif [[ "$retval" == "$syntax_error_retval" ]]; then
     echo -n "syntax error"
     echo
     echo "$out"