mergetool: run prompt only if guessed tool

diff --git a/check-builtins.sh b/check-builtins.sh
index d6fe6cf1749ebcd6189fa36cbb4e14a532d2d17b..07cff69d8e5c5fdbca47b603dbc2e9c067d369fd 100755 (executable)
--- a/check-builtins.sh
+++ b/check-builtins.sh
@@ -14,8 +14,8 @@ sort |
     bad=0
     while read builtin
     do
-       base=`expr "$builtin" : 'git-\(.*\)'`
-       x=`sed -ne 's/.*{ "'$base'", \(cmd_[^, ]*\).*/'$base'   \1/p' git.c`
+       base=$(expr "$builtin" : 'git-\(.*\)')
+       x=$(sed -ne 's/.*{ "'$base'", \(cmd_[^, ]*\).*/'$base'  \1/p' git.c)
        if test -z "$x"
        then
                echo "$base is builtin but not listed in git.c command list"