[clang docs] Minor fix in ClangCheck.rst

[Eugene.Zelenko]

docs/ClangCheck.rst

34–36

clang-check should be prefixed with :program:

Same below.

[mgrang]

Prefixed clang-check with :program:

docs/ClangCheck.rst

(TranslationUnitDecl 0x7ff3a3029ed0 <<invalid sloc>>
     (FunctionDecl 0x7ff3a302a8d0 </Users/danieljasper/clang/llvm/tools/clang/docs/snippet.cc:1:1, line:3:1> f 'void (void)'
       (CompoundStmt 0x7ff3a302aa10 <line:1:10, line:3:1>
         (DeclStmt 0x7ff3a302a9f8 <line:2:3, line:3:1>
           (VarDecl 0x7ff3a302a980 <line:2:3, col:11> a 'int'
             (IntegerLiteral 0x7ff3a302a9d8 <col:11> 'int' 0))))))
   1 error generated.
   Error while processing snippet.cc.
 
-The '--' at the end is important as it prevents `clang-check` from search for a
-compilation database. For more information on how to setup and use `clang-check`
-in a project, see :doc:`HowToSetupToolingForLLVM`.
+The '--' at the end is important as it prevents :program:`clang-check` from
+searching for a compilation database. For more information on how to setup and
+use :program:`clang-check` in a project, see :doc:`HowToSetupToolingForLLVM`.