[PATCH 1 of 5] test-install: fix output on Windows

[Matt Harbison]

# HG changeset patch
# User Matt Harbison <matt_harbison at yahoo.com>
# Date 1458092732 14400
#      Tue Mar 15 21:45:32 2016 -0400
# Node ID b456cb18ff7fd5000cf514fd26bfb195b2e17233
# Parent  86db5cb55d46db3984e94600f3902f47a16437ae
test-install: fix output on Windows

See 1ff28873830e.

diff --git a/tests/test-install.t b/tests/test-install.t
--- a/tests/test-install.t
+++ b/tests/test-install.t
@@ -12,7 +12,7 @@
   no problems detected
 
 hg debuginstall JSON
-  $ hg debuginstall -Tjson
+  $ hg debuginstall -Tjson | sed 's|\\\\|\\|g'
   [
    {
     "defaulttemplate": "*mercurial?templates?map-cmdline.default", (glob)