Fix fmtp parsing with spaces inside

[Olex1313]

Description

Fix fmtp attribute parsing lines with extra spaces, details provided in the issue

Reference issue

Fixes #190

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.96%. Comparing base (d518314) to head (f198008).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #192   +/-   ##
=======================================
  Coverage   64.96%   64.96%           
=======================================
  Files          12       12           
  Lines        1587     1587           
=======================================
  Hits         1031     1031           
  Misses        455      455           
  Partials      101      101           

Flag	Coverage Δ
go	64.96% <100.00%> (ø)
wasm	64.96% <100.00%> (ø)

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