doc:

Author: dashixiong91

fvm.sh

@@ -87,7 +87,7 @@ function install(){
     echo "Error: flutter $version_short seems to has installed ,please check it!!"
     exit 1
   fi
-  echo "flutter $version_short has downloading..."
+  echo "flutter $version_short is downloading..."
   curl --progress-bar -o $temp_path $download_url
   unzip -o $temp_path -d $target_dir
   echo "flutter $version_short has installed to $target_dir!"