Fix code samples for UnnecessarySafeCall

[cortinico]

See #3414 for reference

[codecov]

Codecov Report

Merging #3416 (776b6ab) into master (42678a8) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #3416      +/-   ##
============================================
- Coverage     80.38%   80.37%   -0.02%     
  Complexity     2748     2748              
============================================
  Files           449      449              
  Lines          8300     8295       -5     
  Branches       1587     1587              
============================================
- Hits           6672     6667       -5     
  Misses          774      774              
  Partials        854      854              

Impacted Files	Coverage Δ	Complexity Δ
...rturbosch/detekt/rules/bugs/UnnecessarySafeCall.kt	75.00% <ø> (ø)	4.00 <0.00> (ø)
...ain/kotlin/io/github/detekt/metrics/LinesOfCode.kt	92.30% <0.00%> (-0.80%)	0.00% <0.00%> (ø%)
...gitlab/arturbosch/detekt/cli/runners/AstPrinter.kt	100.00% <0.00%> (ø)	4.00% <0.00%> (ø%)

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