fixed some typos

[AldoCorbelliniUNIPR]

Proposed changes

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If it fixes a bug or resolves a feature request, be sure to link to that issue.

Types of changes

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• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x ] Documentation Update (if none of the other choices apply)

fixed some unspecific typos...

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.68%. Comparing base (2489e78) to head (202d0b2).

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #66   +/-   ##
=======================================
  Coverage   68.67%   68.68%           
=======================================
  Files         344      344           
  Lines       48948    48948           
=======================================
+ Hits        33617    33620    +3     
+ Misses      15331    15328    -3     

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