Remove grawlixes from 2012/vik/README.md

We all know what is meant by 'brain$#@$' and there's no need to censor
it especially when it links to the article on wiki that does not censor
it (not that grawlixes are even censoring anything). This means there's
no need to escape the '$' as they are not there now.

2012/vik/README.md

@@ -111,9 +111,9 @@ additional chunks are copied into the resulting image.
 For some reason the chocolate image seems to have some special properties.
 Apart from being quite big and a little bit noisy, it appears that when embedded
 into another image and extracted, the bitmap data is also a valid
-[brain\$#@\$](https://en.wikipedia.org/wiki/Brainfuck) program. It is of course
+[brainfuck](https://en.wikipedia.org/wiki/Brainfuck) program. It is of course
 possible to get the bitmap data from the extracted image, and run it through any
-of the previous winning brain\$#@\$ interpreters, but I thought it would be easier
+of the previous winning brainfuck interpreters, but I thought it would be easier
 to include an interpreter in the program to avoid the hassle:
 
 ```sh
@@ -122,7 +122,7 @@ to include an interpreter in the program to avoid the hassle:
 ```
 
 It is of course also possible to embed a
-[brain\$#@\$](https://en.wikipedia.org/wiki/Brainfuck) program as a text file
+[brainfuck](https://en.wikipedia.org/wiki/Brainfuck) program as a text file
 (as explained above) and decode it, e.g.:
 
 ```sh
@@ -172,7 +172,7 @@ program to crash.
 
 Since a lot of care was taken to keep the code simple, it turned out to be
 quite easy to extend functionality. I did include a small
-[brain\$#@\$](https://en.wikipedia.org/wiki/Brainfuck) after I
+[brainfuck](https://en.wikipedia.org/wiki/Brainfuck) after I
 realized that the chocolate image had some interesting properties.
 
 But there is more functionality I added that didn't fit within the size
@@ -181,9 +181,9 @@ format source code based on a PNG image. So the format of the program is
 actually done by the program itself.
 
 And to be honest, the chocolate image did not have a
-[brain\$#@\$](https://en.wikipedia.org/wiki/Brainfuck) program
+[brainfuck](https://en.wikipedia.org/wiki/Brainfuck) program
 embedded to begin with. I added functionality to the program to embed a
-brain\$#@\$ into a PNG image and used it to create the image provided with
+brainfuck into a PNG image and used it to create the image provided with
 the entry.
 
 I also added a method to analyze PNG images, to print the size and format,