fix up test styling and add use-strict declarator

test/fixtures/syntax/source-maps/arrow-function/expected.js

@@ -1,3 +1,5 @@
+"use strict";
+
 var t = function(x) {
   return x * x;
-};
+};

test/fixtures/syntax/source-maps/arrow-function/source-mappings.json

@@ -1,10 +1,10 @@
 [{
   "original": {
     "line": 1,
-    "column": 15
+    "column": 18
   },
   "generated": {
-    "line": 2,
-    "column": 11
+    "line": 4,
+    "column": 14
   }
 }]

test/fixtures/syntax/source-maps/class/expected.js

@@ -1,3 +1,5 @@
+"use strict";
+
 var Test = function() {
   var Test = function Test() {};
 
@@ -12,5 +14,5 @@ var Test = function() {
   return Test;
 }();
 
-var test = new Test;
-test.bar;
+var test = new Test();
+test.bar;

test/fixtures/syntax/source-maps/class/source-mappings.json

@@ -4,7 +4,7 @@
     "column": 11
   },
   "generated": {
-    "line": 7,
+    "line": 9,
     "column": 15
   }
 }]

test/fixtures/syntax/source-maps/full/expected.js

@@ -1,3 +1,5 @@
-arr.map(function (x) {
+"use strict";
+
+arr.map(function(x) {
   return x * x;
-});
+});

test/fixtures/syntax/source-maps/full/source-map.json

@@ -3,6 +3,6 @@
   "file": "source-maps/full/expected.js",
   "sources": ["source-maps/full/actual.js"],
   "names": [],
-  "mappings": "AAAA,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,UAAC;SAAK,EAAE,EAAE;CAAC,CAAC",
+  "mappings": ";AAAA,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,UAAC;SAAK,EAAE,EAAE;CAAC,CAAC",
   "sourcesContent": ["arr.map(x => x * x);"]
 }

test/fixtures/syntax/source-maps/inline/expected.js

@@ -1,3 +1,5 @@
-arr.map(function (x) {
+"use strict";
+
+arr.map(function(x) {
   return x * x;
-});
+});