Fixes Blodwynn/-VSCODE-.soy-language-server-client#9
Fixes Blodwynn/-VSCODE-.soy-language-server-client#9

Modify RegExp to only match until first closing } character and make a safe callback if line number is not found and got null as result
Blodwynn/-VSCODE-.soy-language-server-client,Blodwynn/-VSCODE-.soy-language-server-client