fix portability issues with $ in double quotes

diff --git a/git-instaweb.sh b/git-instaweb.sh
index b8e6456208d8cccb669eb125cfb2ac677443db82..6a65f255cc63cc7a6d0ae0fc0ce4b65298a40e82 100755 (executable)
--- a/git-instaweb.sh
+++ b/git-instaweb.sh
@@ -320,7 +320,7 @@ EOF
        else
                # plain-old CGI
                resolve_full_httpd
-               list_mods=$(echo "$full_httpd" | sed "s/-f$/-l/")
+               list_mods=$(echo "$full_httpd" | sed 's/-f$/-l/')
                $list_mods | sane_grep 'mod_cgi\.c' >/dev/null 2>&1 || \
                if test -f "$module_path/mod_cgi.so"
                then