Enter in the middle of a line comment should create a new line comment

Issue Type: <b>Bug</b> I'm using JavaScript but this is likely not language-specific: 1. Start typing a comment ` // something like, if ( true ) ` 2. Type an opening brace ` // something like, if ( true ) {` 3. Editor will insert a closing brace, cursor will be between braces ` // something like, if ( true ) {|}` 4. Hit Enter / Return **Expected:** Newline will automatically be in a commented-out line ``` // something like, if ( true ) { // } ``` **Actual:** The comment is treated like code and an extra newline is inserted, introducing a hanging end-brace: ``` // something like, if ( true ) { } ``` VS Code version: Code 1.38.0 (3db7e09f3b61f915d03bbfa58e258d6eee843f35, 2019-09-03T21:47:00.464Z) OS version: Darwin x64 17.7.0 <details> <summary>System Info</summary> |Item|Value| |---|---| |CPUs|Intel(R) Core(TM) i7-4770HQ CPU @ 2.20GHz (8 x 2200)| |GPU Status|2d_canvas: enabled<br>flash_3d: enabled<br>flash_stage3d: enabled<br>flash_stage3d_baseline: enabled<br>gpu_compositing: enabled<br>multiple_raster_threads: enabled_on<br>native_gpu_memory_buffers: enabled<br>oop_rasterization: disabled_off<br>protected_video_decode: unavailable_off<br>rasterization: enabled<br>skia_deferred_display_list: disabled_off<br>skia_renderer: disabled_off<br>surface_synchronization: enabled_on<br>video_decode: enabled<br>viz_display_compositor: disabled_off<br>webgl: enabled<br>webgl2: enabled| |Load (avg)|2, 2, 2| |Memory (System)|16.00GB (3.65GB free)| |Process Argv|-psn_0_3810210| |Screen Reader|no| |VM|0%| </details><details><summary>Extensions (8)</summary> Extension|Author (truncated)|Version ---|---|--- vscode-css-formatter|aes|1.0.1 xml|Dot|2.5.0 mssql|ms-|1.6.0 debugger-for-chrome|msj|4.11.7 vscode-code-outline|pat|0.2.1 java|red|0.48.0 vscodeintellicode|Vis|1.1.9 vscode-java-debug|vsc|0.21.0 </details> <!-- generated by issue reporter -->