#684 modprep unable to handle quotation mark in single line comment

[Daniel Jour]

Running modprep on a file like the one below:

/* This is working as it should, and isn't failing. */
// This isn't working as it should

results in:

;; MODPREP: "/tmp/foo.c" --> #P"foo.m.c"
;; MODPREP: reading "/tmp/foo.c": 90 bytes, 2 lines
*** - "/tmp/foo.c":2: character not terminated: "// This isn't working as it should"

Removing the single quotation mark from the single line comment solves this:

/* This is working as it should, and isn't failing. */
// This is working as it should