Faulty pre-receive hook

Trying to do what is described in #321 (closed), the dev TMS repo just responded to my git push attempt (as student01) with this:

[master b536634] created foo(int)
 1 file changed, 2 insertions(+)
 create mode 100644 x.txt
Enumerating objects: 4, done.
Counting objects: 100% (4/4), done.
Writing objects: 100% (3/3), 259 bytes | 259.00 KiB/s, done.
Total 3 (delta 0), reused 0 (delta 0), pack-reused 0 (from 0)
remote: hooks/pre-receive: line 4: unexpected EOF while looking for matching `)'
remote: hooks/pre-receive: line 61: syntax error: unexpected end of file
To https://tms.inf.elte.hu/git-dev/14/stud01/w0ef9c202278d9fc80c42cfd80
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://tms.inf.elte.hu/git-dev/14/stud01/w0ef9c202278d9fc80c42cfd80'

On the instructor side, no exit password is set. Also, no IP restrictions.