Minor typos in section "GroovyDoc comment"

(I'm probably going to do a scan through the entire "Groovy Language Documentation" page, at http://beta.groovy-lang.org/docs/groovy-2.3.1/html/documentation/ . This is just the first comment. I did the same for the Gradle User Guide, but I was able to submit all of my recommendations in a single PR. If you want me to do this, and you'd like me to do it in a more efficient way, please tell me.)

In the "GroovyDoc comment" section, there are two minor typos.

The section starts with:
"Similarly to multiline comments, GroovyDoc comments are multiline, but start with /** and end with */. Lines following the first GroovyDoc comment line can optionally start with a star *. Those comments are associated with:"

The two occurrences of "\" (backslash) in "*/" and "*" should be removed.