Emit new lines between source files emit so that the file contents always start on new line

Fixes #500

src/compiler/emitter.ts

@@ -1925,6 +1925,8 @@ module ts {
 
             function emitSourceFile(node: SourceFile) {
                 currentSourceFile = node;
+                // Start new file on new line
+                writeLine();
                 emitDetachedComments(node);
                 // emit prologue directives prior to __extends
                 var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ false);

tests/baselines/reference/sourceMapWithMultipleFilesWithCopyright.js

@@ -0,0 +1,34 @@
+//// [tests/cases/compiler/sourceMapWithMultipleFilesWithCopyright.ts] ////
+
+//// [a.ts]
+/*--------------------------------------------------------------------------
+Copyright 
+---------------------------------------------------------------------------*/
+
+var x = {
+    a: 10,
+    b: 20
+};
+
+//// [b.ts]
+/*--------------------------------------------------------------------------
+Copyright 
+---------------------------------------------------------------------------*/
+
+///<reference path="a.ts"/>
+var y = x;
+
+//// [a.js]
+/*--------------------------------------------------------------------------
+Copyright
+---------------------------------------------------------------------------*/
+var x = {
+    a: 10,
+    b: 20
+};
+/*--------------------------------------------------------------------------
+Copyright
+---------------------------------------------------------------------------*/
+///<reference path="a.ts"/>
+var y = x;
+//# sourceMappingURL=a.js.map

tests/baselines/reference/sourceMapWithMultipleFilesWithCopyright.js.map

@@ -0,0 +1,2 @@
+//// [a.js.map]
+{"version":3,"file":"a.js","sourceRoot":"","sources":["tests/cases/compiler/a.ts","tests/cases/compiler/b.ts"],"names":[],"mappings":"AAAA;;6EAE6E;AAE7E,IAAI,CAAC,GAAG;IACJ,CAAC,EAAE,EAAE;IACL,CAAC,EAAE,EAAE;CACR,CAAC;ACPF;;6EAE6E;AAG7E,AADA,2BAA2B;IACvB,CAAC,GAAG,CAAC,CAAC"}

tests/baselines/reference/sourceMapWithMultipleFilesWithCopyright.sourcemap.txt

@@ -0,0 +1,134 @@
+===================================================================
+JsFile: a.js
+mapUrl: a.js.map
+sourceRoot: 
+sources: tests/cases/compiler/a.ts,tests/cases/compiler/b.ts
+===================================================================
+-------------------------------------------------------------------
+emittedFile:a.js
+sourceFile:tests/cases/compiler/a.ts
+-------------------------------------------------------------------
+>>>/*--------------------------------------------------------------------------
+1 >
+2 >^^^^^^^^^^->
+1 >
+1 >Emitted(1, 1) Source(1, 1) + SourceIndex(0)
+---
+>>>Copyright
+>>>---------------------------------------------------------------------------*/
+1->^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+1->/*--------------------------------------------------------------------------
+  >Copyright 
+  >---------------------------------------------------------------------------*/
+1->Emitted(3, 78) Source(3, 78) + SourceIndex(0)
+---
+>>>var x = {
+1 >
+2 >^^^^
+3 >    ^
+4 >     ^^^
+5 >        ^^^->
+1 >
+  >
+  >
+2 >var 
+3 >    x
+4 >      = 
+1 >Emitted(4, 1) Source(5, 1) + SourceIndex(0)
+2 >Emitted(4, 5) Source(5, 5) + SourceIndex(0)
+3 >Emitted(4, 6) Source(5, 6) + SourceIndex(0)
+4 >Emitted(4, 9) Source(5, 9) + SourceIndex(0)
+---
+>>>    a: 10,
+1->^^^^
+2 >    ^
+3 >     ^^
+4 >       ^^
+5 >         ^->
+1->{
+  >    
+2 >    a
+3 >     : 
+4 >       10
+1->Emitted(5, 5) Source(6, 5) + SourceIndex(0)
+2 >Emitted(5, 6) Source(6, 6) + SourceIndex(0)
+3 >Emitted(5, 8) Source(6, 8) + SourceIndex(0)
+4 >Emitted(5, 10) Source(6, 10) + SourceIndex(0)
+---
+>>>    b: 20
+1->^^^^
+2 >    ^
+3 >     ^^
+4 >       ^^
+1->,
+  >    
+2 >    b
+3 >     : 
+4 >       20
+1->Emitted(6, 5) Source(7, 5) + SourceIndex(0)
+2 >Emitted(6, 6) Source(7, 6) + SourceIndex(0)
+3 >Emitted(6, 8) Source(7, 8) + SourceIndex(0)
+4 >Emitted(6, 10) Source(7, 10) + SourceIndex(0)
+---
+>>>};
+1 >^
+2 > ^
+3 >  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^->
+1 >
+  >}
+2 > ;
+1 >Emitted(7, 2) Source(8, 2) + SourceIndex(0)
+2 >Emitted(7, 3) Source(8, 3) + SourceIndex(0)
+---
+-------------------------------------------------------------------
+emittedFile:a.js
+sourceFile:tests/cases/compiler/b.ts
+-------------------------------------------------------------------
+>>>/*--------------------------------------------------------------------------
+1->
+2 >^^^^^^^^^^->
+1->
+1->Emitted(8, 1) Source(1, 1) + SourceIndex(1)
+---
+>>>Copyright
+>>>---------------------------------------------------------------------------*/
+1->^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+1->/*--------------------------------------------------------------------------
+  >Copyright 
+  >---------------------------------------------------------------------------*/
+1->Emitted(10, 78) Source(3, 78) + SourceIndex(1)
+---
+>>>///<reference path="a.ts"/>
+1 >
+2 >
+3 >^^^^^^^^^^^^^^^^^^^^^^^^^^^
+1 >
+  >
+  >///<reference path="a.ts"/>
+  >
+2 >
+3 >///<reference path="a.ts"/>
+1 >Emitted(11, 1) Source(6, 1) + SourceIndex(1)
+2 >Emitted(11, 1) Source(5, 1) + SourceIndex(1)
+3 >Emitted(11, 28) Source(5, 28) + SourceIndex(1)
+---
+>>>var y = x;
+1 >^^^^
+2 >    ^
+3 >     ^^^
+4 >        ^
+5 >         ^
+6 >          ^^^^^^^^^^^^^^^^^^->
+1 >
+  >var 
+2 >    y
+3 >      = 
+4 >        x
+5 >         ;
+1 >Emitted(12, 5) Source(6, 5) + SourceIndex(1)
+2 >Emitted(12, 6) Source(6, 6) + SourceIndex(1)
+3 >Emitted(12, 9) Source(6, 9) + SourceIndex(1)
+4 >Emitted(12, 10) Source(6, 10) + SourceIndex(1)
+5 >Emitted(12, 11) Source(6, 11) + SourceIndex(1)
+---
+>>>//# sourceMappingURL=a.js.map

tests/baselines/reference/sourceMapWithMultipleFilesWithCopyright.types

@@ -0,0 +1,30 @@
+=== tests/cases/compiler/b.ts ===
+/*--------------------------------------------------------------------------
+Copyright 
+---------------------------------------------------------------------------*/
+
+///<reference path="a.ts"/>
+var y = x;
+>y : { a: number; b: number; }
+>x : { a: number; b: number; }
+
+=== tests/cases/compiler/a.ts ===
+/*--------------------------------------------------------------------------
+Copyright 
+---------------------------------------------------------------------------*/
+
+var x = {
+>x : { a: number; b: number; }
+>{
+    a: 10,
+    b: 20
+} : { a: number; b: number; }
+
+    a: 10,
+>a : number
+
+    b: 20
+>b : number
+
+};
+

tests/cases/compiler/sourceMapWithMultipleFilesWithCopyright.ts

@@ -0,0 +1,19 @@
+// @out: a.js
+// @sourcemap: true
+// @Filename: a.ts
+/*--------------------------------------------------------------------------
+Copyright 
+---------------------------------------------------------------------------*/
+
+var x = {
+    a: 10,
+    b: 20
+};
+
+// @Filename: b.ts
+/*--------------------------------------------------------------------------
+Copyright 
+---------------------------------------------------------------------------*/
+
+///<reference path="a.ts"/>
+var y = x;