You can clone with
HTTPS or Subversion.
localhost ~ $ perl mysqltuner.pl
Bareword found where operator expected at mysqltuner.pl line 9, near "MySQLTuner"<br>
(Missing operator before MySQLTuner?)<br>
syntax error at mysqltuner.pl line 5, near "html>"<br>
Unrecognized character \xC2; marked by <-- HERE after at master <-- HERE near column 56 at mysqltuner.pl line 9.</p>
I am seeing exactly the same issue
This happens if you attempt to use wget (as suggested in the readme) to retrieve the file, which actually just retrieves some HTML output from the Github site instead of the actual perl script.
Clone the repo instead and it will work as expected.
It's work fo me.