Use ellipsis ... to indicate omitted commands

In an example like "clang -fxray-instrument .." the .. could be confused
with a literal .. (parent directory), which is used in commands like
"cmake -GNinja .."


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@327000 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed