Merge pull request #882 from Homebrew/printf-fish-only

Author: ZhongRuoyu

install.sh

@@ -1055,8 +1055,9 @@ EOS
   fi
 else
   cat <<EOS
-- Run these two commands in your terminal to add Homebrew to your ${tty_bold}PATH${tty_reset}:
-    printf '%s\n' '' 'eval "\$(${HOMEBREW_PREFIX}/bin/brew shellenv)"' >> ${shell_rcfile}
+- Run these commands in your terminal to add Homebrew to your ${tty_bold}PATH${tty_reset}:
+    echo >> ${shell_rcfile}
+    echo 'eval "\$(${HOMEBREW_PREFIX}/bin/brew shellenv)"' >> ${shell_rcfile}
     eval "\$(${HOMEBREW_PREFIX}/bin/brew shellenv)"
 EOS
 fi