Fixes #2061: ArgumentMatcher error messages use lambda class names

[Marcono1234]

Fixes #2061

[TimvdLippe]

Nice fix!

[codecov-io]

Codecov Report

Merging #2071 into release/3.x will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@              Coverage Diff               @@
##             release/3.x    #2071   +/-   ##
==============================================
  Coverage          84.90%   84.90%           
- Complexity          2704     2705    +1     
==============================================
  Files                325      325           
  Lines               8206     8210    +4     
  Branches             979      980    +1     
==============================================
+ Hits                6967     6971    +4     
  Misses               968      968           
  Partials             271      271           

Impacted Files	Coverage Δ	Complexity Δ
...ain/java/org/mockito/internal/util/StringUtil.java	100.00% <ø> (ø)	13.00 <0.00> (ø)
...ockito/internal/matchers/text/MatcherToString.java	92.85% <100.00%> (+2.85%)	5.00 <0.00> (+1.00)

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