The warnings included recommendations of braces for if statement
readability, a recommendation for default initialization of an int
array, and include-what-you-use (indirectly through clang-tidy reporting
undefined symbols).
Inconsistent names were found using the following regular expressions.
* `rg "TEST(_F|_P)?\(\w+,\s+\w+Test\)"`
* `rg "TEST(_F|_P)?\(\w+,\s+Test\w+\)"`
* `rg "TEST(_F|_P)?\(\w+Tests,\s+\w+\)"`
Fixes#3495.
