Fix whitespace around inserted static property

Fixes microsoft#18743

Author: amcasey

src/services/codefixes/fixAddMissingMember.ts

@@ -92,7 +92,7 @@ namespace ts.codefix {
                     classDeclarationSourceFile,
                     classDeclaration,
                     staticInitialization,
-                    { suffix: context.newLineCharacter });
+                    { prefix: context.newLineCharacter, suffix: context.newLineCharacter });
                 const initializeStaticAction = {
                     description: formatStringFromArgs(getLocaleSpecificMessage(Diagnostics.Initialize_static_property_0), [tokenName]),
                     changes: staticInitializationChangeTracker.getChanges()

tests/cases/fourslash/codeFixAddMissingMember5.ts

@@ -13,11 +13,12 @@
 verify.codeFix({
     description: "Initialize static property 'foo'.",
     index: 0,
-    // TODO: GH#18743 and GH#18445
+    // TODO: GH#18445
     newFileContent: `class C {
     static method() {
         ()=>{ this.foo === 10 };
     }
-}C.foo = undefined;\r
+}\r
+C.foo = undefined;\r
 `
 });

tests/cases/fourslash/codeFixAddMissingMember7.ts

@@ -11,9 +11,10 @@
 verify.codeFix({
     description: "Initialize static property 'foo'.",
     index: 2,
-    // TODO: GH#18743 and GH#18445
+    // TODO: GH#18445
     newFileContent: `class C {
     static p = ()=>{ this.foo === 10 };
-}C.foo = undefined;\r
+}\r
+C.foo = undefined;\r
 `
 });