test(transformer): clean up identation in test fixtures (#5863)

Not sure how added up with mix of tabs and spaces.

tasks/transform_conformance/tests/babel-plugin-transform-arrow-functions/test/fixtures/arrow-in-class-static-block/output.js

@@ -1,9 +1,9 @@
 let f;
 class C {
   static {
-	var _this = this;
-	f = function() {
-	  return _this;
-	};
+    var _this = this;
+    f = function() {
+      return _this;
+    };
   }
 }

tasks/transform_conformance/tests/babel-plugin-transform-arrow-functions/test/fixtures/use-this-inside-blocks/output.js

@@ -1,13 +1,13 @@
 function foo() {
-	var _this = this;
-	{
-					let f = function() {
-									return _this;
-					};
-	}
-	{
-					let f2 = function() {
-									return _this;
-					};
-	}
+  var _this = this;
+  {
+    let f = function() {
+      return _this;
+    };
+  }
+  {
+    let f2 = function() {
+      return _this;
+    };
+  }
 }

tasks/transform_conformance/tests/babel-plugin-transform-arrow-functions/test/fixtures/with-this-member-expression/output.js

@@ -1,10 +1,10 @@
 var _this = this;
 (function() {
-       return <_this.foo></_this.foo>;
+  return <_this.foo></_this.foo>;
 });
 (function() {
-       return <_this.foo.bar></_this.foo.bar>;
+  return <_this.foo.bar></_this.foo.bar>;
 });
 (function() {
-       return <_this.foo.bar.qux />;
+  return <_this.foo.bar.qux />;
 });