Output Grammar name with the baseline scopes

Also cleans up existing generated folder to ensure we are always comparing latest results

Author: sheetalkamat

tests/baselines/Abstracts.baseline.txt

@@ -18,6 +18,8 @@ let cow = new Cow();
 cow.makeSound();
 -----------------------------------
 
+Grammar: TypeScript.tmLanguage
+-----------------------------------
 >abstract class Animal {
  ^^^^^^^^
  source.ts meta.class.ts storage.modifier.ts

tests/baselines/Abstracts.txt

@@ -18,6 +18,8 @@ let cow = new Cow();
 cow.makeSound();
 -----------------------------------
 
+Grammar: TypeScript.tmLanguage
+-----------------------------------
 >abstract class Animal {
  ^^^^^^^^
  [1, 1]: source.ts meta.class.ts storage.modifier.ts 

tests/baselines/ArrowFunctionInsideTypeAssertion.baseline.txt

@@ -24,6 +24,8 @@ function f(x: string | ((value: string) => number)) {
 
 -----------------------------------
 
+Grammar: TypeScript.tmLanguage
+-----------------------------------
 >// Issue: https://github.com/Microsoft/TypeScript-Sublime-Plugin/issues/292
  ^^
  source.ts comment.line.double-slash.ts punctuation.definition.comment.ts

tests/baselines/ArrowFunctionInsideTypeAssertion.txt

@@ -24,6 +24,8 @@ function f(x: string | ((value: string) => number)) {
 
 -----------------------------------
 
+Grammar: TypeScript.tmLanguage
+-----------------------------------
 >// Issue: https://github.com/Microsoft/TypeScript-Sublime-Plugin/issues/292
 >
 >var object = {

tests/baselines/Comments.baseline.txt

@@ -72,6 +72,8 @@ var x = ^^/* comments */ new String();
 var x = new ^^/* comments */ String();
 -----------------------------------
 
+Grammar: TypeScript.tmLanguage
+-----------------------------------
 >/*
  ^^
  source.ts comment.block.ts punctuation.definition.comment.ts

tests/baselines/Comments.txt

@@ -72,6 +72,8 @@ var x = ^^/* comments */ new String();
 var x = new ^^/* comments */ String();
 -----------------------------------
 
+Grammar: TypeScript.tmLanguage
+-----------------------------------
 >/*
 >Tests for comments in general.
 >

tests/baselines/FunctionMethodOverloads.baseline.txt

@@ -52,6 +52,8 @@ abstract class C {
 }
 -----------------------------------
 
+Grammar: TypeScript.tmLanguage
+-----------------------------------
 >/* Function overload tests */
  ^^
  source.ts comment.block.ts punctuation.definition.comment.ts

tests/baselines/FunctionMethodOverloads.txt

@@ -52,6 +52,8 @@ abstract class C {
 }
 -----------------------------------
 
+Grammar: TypeScript.tmLanguage
+-----------------------------------
 >/* Function overload tests */
 >export function testFunctionOverload(p: number): new() => any
  ^^^^^^

tests/baselines/FunctionMethodParameters.baseline.txt

@@ -33,6 +33,8 @@ class testClass {
 }
 -----------------------------------
 
+Grammar: TypeScript.tmLanguage
+-----------------------------------
 >/* Function parameter tests */
  ^^
  source.ts comment.block.ts punctuation.definition.comment.ts

tests/baselines/FunctionMethodParameters.txt

@@ -33,6 +33,8 @@ class testClass {
 }
 -----------------------------------
 
+Grammar: TypeScript.tmLanguage
+-----------------------------------
 >/* Function parameter tests */
 >function testFunctionParamType(
 >    m1: string,