src/run.bash: remove some trailing whitespace

Change-Id: I56a4d25bdf886d0c0cc9723c197a014dfc9da3d3
Reviewed-on: https://go-review.googlesource.com/103995Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/run.bash

@@ -35,7 +35,7 @@ ulimit -c 0
 # non-root process is allowed to set the high limit.
 # This is a system misconfiguration and should be fixed on the
 # broken system, not "fixed" by ignoring the failure here.
-# See longer discussion on golang.org/issue/7381. 
+# See longer discussion on golang.org/issue/7381.
 [ "$(ulimit -H -n)" = "unlimited" ] || ulimit -S -n $(ulimit -H -n)
 [ "$(ulimit -H -d)" = "unlimited" ] || ulimit -S -d $(ulimit -H -d)