Exam Rank 04, Wrongfully checks "|" followed by nothing.

[kayhanaykin]

Thanks you for this awesome tool to exercise and learn. During my exercises I have encountered this problem:

• At the README.md file, it states that "we will never try a "|" immediately followed or preceded by nothing".

• Grademe tests for:
  ./microshell /bin/ls "|" ................. /usr/bin/grep micro "|" /usr/bin/grep micro "|"
  (ending with pipe and followed by NULL)