[BUG] First line gets cut off in multiline output with CodeExecCog

[rosalogia]

Describe the bug
When the Rextester Code Execution Cog runs code whose output is multiple lines, the first line is always cut off.

To Reproduce
Steps to reproduce the behavior:

1. Use command !exec with some input that produces a multiline output such as

for i in range(10):
    print(i)

2. First line of output will be skipped

Expected behavior
All lines of output should be displayed properly

Screenshots