doc/go1.2.html: Go 1.2, not Go1.2

R=r
CC=golang-dev
https://golang.org/cl/13735044

doc/go1.2.html

@@ -131,7 +131,7 @@ This is a backwards-compatible change that affects no existing programs.
 In prior releases, a goroutine that was looping forever could starve out other
 goroutines on the same thread, a serious problem when GOMAXPROCS
 provided only one user thread.
-In Go1.2, this is partially addressed: The scheduler is invoked occasionally
+In Go 1.2, this is partially addressed: The scheduler is invoked occasionally
 upon entry to a function.
 This means that any loop that includes a (non-inlined) function call can
 be pre-empted, allowing other goroutines to run on the same thread.