scp: address shellcheck SC2089 and SC2090

completions/ssh

@@ -398,6 +398,7 @@ _sftp()
 shopt -u hostcomplete && complete -F _sftp sftp
 
 # things we want to backslash escape in scp paths
+# shellcheck disable=SC2089
 _scp_path_esc='[][(){}<>",:;^&!$=?`|\\'"'"'[:space:]]'
 
 # Complete remote files with ssh.  If the first arg is -d, complete on dirs
@@ -414,6 +415,7 @@ _scp_remote_files()
     local path=${cur#*:}
 
     # unescape (3 backslashes to 1 for chars we escaped)
+    # shellcheck disable=SC2090
     path=$(command sed -e 's/\\\\\\\('$_scp_path_esc'\)/\\\1/g' <<<"$path")
 
     # default to home dir of specified user on remote host
@@ -424,12 +426,14 @@ _scp_remote_files()
     local files
     if [[ $1 == -d ]]; then
         # escape problematic characters; remove non-dirs
+        # shellcheck disable=SC2090
         files=$(ssh -o 'Batchmode yes' $userhost \
             command ls -aF1dL "$path*" 2>/dev/null | \
             command sed -e 's/'$_scp_path_esc'/\\\\\\&/g' -e '/[^\/]$/d')
     else
         # escape problematic characters; remove executables, aliases, pipes
         # and sockets; add space at end of file names
+        # shellcheck disable=SC2090
         files=$(ssh -o 'Batchmode yes' $userhost \
             command ls -aF1dL "$path*" 2>/dev/null | \
             command sed -e 's/'$_scp_path_esc'/\\\\\\&/g' -e 's/[*@|=]$//g' \