Fix IRC color code bug

[cyruslabs]

Fix IRC color bug preventing some color codes (e.g cyan) from formatting properly.

Test pass after fix:
=== RUN TestFormat
--- PASS: TestFormat (0.00s)
PASS

[codecov-io]

Codecov Report

Merging #24 into master will not change coverage.
The diff coverage is 0%.

@@           Coverage Diff           @@
##           master      #24   +/-   ##
=======================================
  Coverage   56.16%   56.16%           
=======================================
  Files          13       13           
  Lines        2329     2329           
=======================================
  Hits         1308     1308           
  Misses        913      913           
  Partials      108      108

Impacted Files	Coverage Δ
format.go	97.16% <0%> (ø)	⬆️

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[lrstanley]

Nice catch, surprised I didn't see this before. Can you add an additional entry to TestFormat that includes using cyan?

[cyruslabs]

Sure, just updated the branch adding red and cyan tests (one was working before and the other wasn't).

Thanks for this great project by the way! Much appreciated.