Fix documentation in UnnecessarySafeCall

[chao2zhang]

📝

[codecov]

Codecov Report

Merging #3412 (ae43de1) into master (2730336) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #3412   +/-   ##
=========================================
  Coverage     80.38%   80.38%           
  Complexity     2748     2748           
=========================================
  Files           449      449           
  Lines          8300     8300           
  Branches       1587     1587           
=========================================
  Hits           6672     6672           
  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)

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