Fix compile errors in fourslash tests

tests/cases/fourslash/addMethodToInterface1.ts

@@ -9,7 +9,7 @@
 
 edit.disableFormatting();
 
-goTo.marker(1);
+goTo.marker('1');
 
 edit.insert("    compareTo(): number;\n");
 diagnostics.validateTypesAtPositions(168,84,53,118,22);

tests/cases/fourslash/arrayConcatTypeCheck0.ts

@@ -11,7 +11,7 @@
 
 edit.disableFormatting();
 
-goTo.marker(1);
+goTo.marker('1');
 
 edit.insert(", 'world'");
 diagnostics.validateTypesAtPositions(78);

tests/cases/fourslash/arrayConcatTypeCheck1.ts

@@ -10,18 +10,18 @@
 
 edit.disableFormatting();
 
-goTo.marker(1);
+goTo.marker('1');
 
 edit.deleteAtCaret(9);
 
-goTo.marker(3);
+goTo.marker('3');
 
 edit.deleteAtCaret(7);
 
-goTo.marker(2);
+goTo.marker('2');
 
 edit.deleteAtCaret(7);
 
-goTo.marker(4);
+goTo.marker('4');
 diagnostics.validateTypesAtPositions(43);
 

tests/cases/fourslash/genericParameterHelp.ts

@@ -27,7 +27,7 @@
 ////class Bar<T> extends testClass</*type3*/
 ////var x : testClass<,, /*type4*/any>;
 
-// goTo.marker("1");
+goTo.marker("1");
 // verify.currentSignatureParamterCountIs(3);
 // verify.currentSignatureHelpIs("testFunction<T extends IFoo, U, M extends IFoo>(a: T, b: U, c: M): M");
 

tests/cases/fourslash/importDeclPaste0.ts

@@ -13,6 +13,6 @@
 
 edit.disableFormatting();
 
-goTo.marker(1);
+goTo.marker('1');
 
 //edit.insert("\nimport I1 = module(\"exportEqualsInterface_A\");\n");

tests/cases/fourslash/multipleExportAssignmentsErrorList0.ts

@@ -18,10 +18,10 @@
 //// 
 
 edit.disableFormatting();
-goTo.marker(1);
+goTo.marker('1');
 
 edit.deleteAtCaret(24);
 
-goTo.marker(1);
+goTo.marker('1');
 
 edit.insert("export = connectExport;\n");