Correct grammar in RFC 2857

Author: kellytk

text/2857-roadmap-2020.md

@@ -161,7 +161,7 @@ There are several motivations here. First, the set of "in-progress"
 designs and efforts already encompasses the most hotly desired
 features and initiatives. But further, stalled work can be
 demotivating and confusing. When an initiative spans over several
-years, it becomes harder and harder to track the current the state and
+years, it becomes harder and harder to track the current state and
 to remember all of the key design constraints. This in turn hinders
 participation in the Rust project and makes it harder to figure out
 what is going on (see also: the goal of improving visibility into the