Error (10170) appears in Quartus II for certain lines in code for Quartus 9.1

[Altera_Forum]

Hello to anyone who is reading this thread. I'd like to know if there is anything wrong with this verilog code. I took this from one of the tutorials that I'm referring, but when I analyze this .v file Quartus keeps coming up with the Error (10170) on a few lines. The code is as attached (I couldn't copy and paste the code directly so I had to submit an attachment, sorry): 

 According to Quartus 9.1, the error appears on lines 20, 21, 24, 30, and 34  The error is something like this: Error (10170): Verilog HDL syntax error at serial.v(30) near text "'"; expecting ";"  I can't quite figure what is the main problem, so any help would be greatly appreciated.

[Altera_Forum]

You are using the wrong apostrophe in these lines where the error appears. 

 Instead of: ’   you have to use: '

[Altera_Forum]

Thanks for pointing out the error. I'm obviously still a beginner on this language. There is another error but I think I know how to modify it to get it working. 

 Thanks again