sql language injection not properly terminated in tagged template literals #601

Prerequisites

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Description

Does not properly end SQL language injection in tagged template literals. The npm package sql-template-strings supports a .append function that can be used to chain together a complex sql query. If a parenthesis is opened in one tagged template literal where the injected grammar is sql, the language injection doesn't stop when the template string is terminated.

Steps to Reproduce

1. Open a .js file
2. create a a tagged template literal with SQL``
3. Do something like

const sql = SQL`SELECT * FROM ( SELECT *`
... write more javascript 

The javascript will not be parsed correctly until the parens is closed.

Expected behavior: terminated language injection when template literal is closed

Actual behavior: javascript below will be parsed incorrectly

Reproduces how often: 100%

Versions

Atom : 1.31.1
Electron: 2.0.7
Chrome : 61.0.3163.100
Node : 8.9.3
OS: Ubuntu 16.04