Various code improvements

[AydinHassan]

No description provided.

[codecov-io]

Codecov Report

Merging #181 into master will decrease coverage by 0.00%.
The diff coverage is 87.50%.

@@             Coverage Diff              @@
##             master     #181      +/-   ##
============================================
- Coverage     95.52%   95.51%   -0.01%     
+ Complexity      636      633       -3     
============================================
  Files            95       95              
  Lines          1942     1940       -2     
============================================
- Hits           1855     1853       -2     
  Misses           87       87              

Impacted Files	Coverage Δ	Complexity Δ
src/Check/CodeParseCheck.php	100.00% <ø> (ø)	7.00 <0.00> (ø)
src/Check/FileExistsCheck.php	100.00% <ø> (ø)	6.00 <0.00> (ø)
src/Check/PhpLintCheck.php	100.00% <ø> (ø)	6.00 <0.00> (ø)
src/Command/PrintCommand.php	100.00% <ø> (ø)	2.00 <0.00> (ø)
src/Command/VerifyCommand.php	100.00% <ø> (ø)	4.00 <0.00> (ø)
src/Event/EventDispatcher.php	100.00% <ø> (ø)	12.00 <0.00> (ø)
src/Exception/ExerciseNotAssignedException.php	100.00% <ø> (ø)	1.00 <0.00> (ø)
src/Exception/MissingArgumentException.php	100.00% <ø> (ø)	2.00 <0.00> (ø)
src/ExerciseDispatcher.php	100.00% <ø> (ø)	20.00 <0.00> (ø)
src/Input/Input.php	94.44% <ø> (ø)	9.00 <0.00> (ø)
... and 23 more

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