1s1 input.js /^var s1 = "I'm invalid because not terminated$/;" v
2s2 input.js /^var s2 = "I'm valid, I have a line continuation:\\$/;" v
3s3 input.js /^var s3 = "I'm invalid because I'm not terminated either \\$/;" v
4s4 input.js /^var s4 = 'this is a separate, valid string'$/;" v
5