Typescript syntax highlight breaks on function calls with multiline generics

[kallja]

• VSCode Version: 1.36.1
• OS Version: macOS 10.14.5

Steps to Reproduce:

1. create a new typescript file with the provided code content

   // Function declaration syntax highlight works as expected
   const fn = <
     ThisVeryLongTypeParameterNameTellsALotOfHowTheParamIsUsedInThisFunction,
     B
   >(
     a: ThisVeryLongTypeParameterNameTellsALotOfHowTheParamIsUsedInThisFunction,
   ) => {
     return {} as B;
   };
   
   type ATypeWithAnIncrediclyLongYetStrangelyDescriptiveName = {};
   type AnOtherTypeWithAVeryLongName = {};
   
   // Function call syntax hightlight breaks
   fn<
     ATypeWithAnIncrediclyLongYetStrangelyDescriptiveName,
     AnOtherTypeWithAVeryLongName
   >({});

2. Review the broken syntax highlight at the function call:
   

Does this issue occur when all extensions are disabled?: Yes

[sheetalkamat]

This is working as per limitation of tmLanguage grammar since it doesnot allow multiline lookup. At fn we don't know if its a less than expression or call and hence the coloring.