PATCH: fix syntax error in lib/tip.exp

[Ben Elliston]

I have been running the ttclchecker syntax checker over the DejaGnu
sources and slowly fixing problems it identifies. Here's a patch for
the first one:

2018-12-08  Ben Elliston  <address@hidden>

        * lib/tip.exp (tip_open): Put braces around if expression.

diff --git a/lib/tip.exp b/lib/tip.exp
index 8e19178..9fb94dd 100644
--- a/lib/tip.exp
+++ b/lib/tip.exp
@@ -59,7 +59,7 @@ proc tip_open { hostname } {
                    warning "Never got prompt."
                    set result -1
                    incr tries
-                   if $tries<=2 {
+                   if { $tries <= 2 } {
                        exp_continue
                    }
                }

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