Doesn't work if whitespace before doctype

[ghost]

Issue details

Browsersync doesn't seem to work if there is any whitespace before the doctype. The snippet never gets loaded and no errors in the console, using the proxy feature.

Steps to reproduce/test case

Proxy to a page which has whitespace before the doctype.

Please specify which version of Browsersync, node and npm you're running

• Browsersync [ 2.12.10 ]
• Node [ 7.3.0 ]
• Npm [ 3.10.10 ]

Affected platforms

• [ ] linux
• [ ] windows
• [x] OS X
• [ ] freebsd
• [ ] solaris
• [ ] other (please specify which)

Browsersync use-case

• [ ] API
• [x] Gulp
• [ ] Grunt
• [ ] CLI

for all other use-cases, (gulp, grunt etc), please show us exactly how you're using Browsersync

gulp.task('watch', function() {

    // Javascipt
    browserSync.watch(config.paths.javascript.src + "/**/*.js", function(event, file) {

        if(event === "change") {
            var pathArray = file.split('/');
            javascriptTask(pathArray[5]);
        }
    });

    // CSS
    browserSync.watch(config.paths.styles.src + "/**/*.scss", function(event, file) {

        if(event === "change") {
            var pathArray = file.split('/');
            cssTask(pathArray[5]);
        }
    });

    // Images
    watch(config.paths.images.src + "/**/*", function() {
        gulp.start('images');
    });

    // HTML
    watch(config.paths.templates + "/**/*", function(event) {

        if(event === "change") {
            browserSync.reload();
        }
    });

    // Browsersync
    browserSync.init({
        files: [
            config.paths.javascript.dist,
            config.paths.styles.dist,
            config.paths.images.dist,
            config.paths.templates
        ],
        proxy: config.url
    });
});

[codep0et]

+1 here, after 3 hours of debugging, realized my wordpress template file was outputting a new line before the doctype.

Even trying to switch around snipperOptions to change the regex to something else than body didnt work.