spec: delete spurious space (missed fix from previous review)
No semantic change.

R=rsc
CC=golang-dev
https://golang.org/cl/2099041
diff --git a/doc/go_spec.html b/doc/go_spec.html
index 5843b75..861c858 100644
--- a/doc/go_spec.html
+++ b/doc/go_spec.html
@@ -1907,7 +1907,7 @@
 </p>
 
 <pre>
-func (p *Point, factor float)
+func(p *Point, factor float)
 </pre>
 
 <p>