Covered more cases for arrow functions omitting arrows.

Specifically where we have a full signature followed by an open curly brace.

tests/baselines/reference/arrowFunctionsMissingTokens.errors.txt

@@ -1,4 +1,4 @@
-==== tests/cases/compiler/arrowFunctionsMissingTokens.ts (39 errors) ====
+==== tests/cases/compiler/arrowFunctionsMissingTokens.ts (31 errors) ====
     
     module missingArrowsWithCurly {
         var a = () { };
@@ -11,31 +11,15 @@
     
         var c = (x) { };
                     ~
-!!! ',' expected.
-                 ~
-!!! Cannot find name 'x'.
+!!! '=>' expected.
     
         var d = (x: number, y: string) { };
-                  ~
-!!! ')' expected.
-                                     ~
-!!! ',' expected.
                                        ~
-!!! Variable declaration expected.
-                 ~
-!!! Cannot find name 'x'.
+!!! '=>' expected.
     
         var e = (x: number, y: string): void { };
-                  ~
-!!! ')' expected.
-                                     ~
-!!! ',' expected.
-                                      ~
-!!! Variable declaration expected.
-                                        ~~~~
-!!! Variable declaration expected.
-                 ~
-!!! Cannot find name 'x'.
+                                             ~
+!!! '=>' expected.
     }
     
     module missingCurliesWithArrow {

tests/baselines/reference/fatarrowfunctionsErrors.errors.txt

@@ -1,4 +1,4 @@
-==== tests/cases/compiler/fatarrowfunctionsErrors.ts (25 errors) ====
+==== tests/cases/compiler/fatarrowfunctionsErrors.ts (18 errors) ====
     foo((...Far:any[])=>{return 0;})
     ~~~
 !!! Cannot find name 'foo'.
@@ -39,25 +39,11 @@
                       ~
 !!! '=>' expected.
     var x2 = (a:number) :void {};
-               ~
-!!! ')' expected.
-                      ~
-!!! ',' expected.
-                        ~
-!!! Variable declaration expected.
-                         ~~~~
-!!! Variable declaration expected.
-              ~
-!!! Cannot find name 'a'.
+                              ~
+!!! '=>' expected.
     var x3 = (a:number) {};
-               ~
-!!! ')' expected.
-                      ~
-!!! ',' expected.
                         ~
-!!! Variable declaration expected.
-              ~
-!!! Cannot find name 'a'.
+!!! '=>' expected.
     var x4= (...a: any[]) { };
                           ~
 !!! '=>' expected.

tests/baselines/reference/invalidTryStatements2.errors.txt

@@ -1,4 +1,4 @@
-==== tests/cases/conformance/statements/tryStatements/invalidTryStatements2.ts (5 errors) ====
+==== tests/cases/conformance/statements/tryStatements/invalidTryStatements2.ts (4 errors) ====
     function fn() {
         try {
         } catch { // syntax error, missing '(x)'
@@ -10,9 +10,7 @@
         ~~~~~
 !!! Statement expected.
                  ~
-!!! ';' expected.
-              ~
-!!! Cannot find name 'x'.
+!!! '=>' expected.
     
         finally{ } // error missing try
         ~~~~~~~