fix(escapeJsString): unbork code broken by prettier

This revert's a prettier change which breaks the JS
encoding of sources like c't. They get messed up to
something like c\`t which Genios dutyfully
acknowledges with a HTTP 400 Bad request.

More see #514

Closes #514

Author: bentolor

src/utils.ts

@@ -1,4 +1,3 @@
-
 const ident = (x) => x
 
 function interpolate(
@@ -25,7 +24,8 @@ function interpolate(
 }
 
 const escapeJsString = (str) => {
-  return str.replace(/\\/g, '\\\\').replace(/'/g, "\\'")
+  // prettier-ignore
+  return str.replace(/\\/g, '\\\\').replace(/'/g, '\\\'')
 }
 
 export { escapeJsString, interpolate }