style: add type hints to _prepare_printer_program and SimpleFunction

[vil02]

Related to #201.

Found 526 errors in 45 files (checked 52 source files)

reduced to

Found 523 errors in 45 files (checked 52 source files)

[gitpod-io]

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
+0.00%	100.00%

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (add2791)	493	493	100.00%
Head commit (64da6b0)	492 (-1)	492 (-1)	100.00% (+0.00%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#204)	6	6	100.00%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (add2791) 100.00% compared to head (64da6b0) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #204   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           18        18           
  Lines          493       492    -1     
  Branches        43        43           
=========================================
- Hits           493       492    -1     

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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

100.0% Coverage
0.0% Duplication