Fix various useful clang-tidy warnings

* bugprone-branch-clone
* bugprone-copy-constructor-init
* bugprone-empty-catch
* bugprone-sizeof-expression
* bugprone-switch-missing-default-case
* bugprone-unused-local-non-trivial-variable
* clang-analyzer-core.uninitialized.Assign
* clang-analyzer-cplusplus.Move
* clang-analyzer-optin.cplusplus.VirtualCall
* modernize-loop-convert
* modernize-raw-string-literal
* modernize-use-equals-default
* modernize-use-override
* modernize-use-using
* performance-avoid-endl
* performance-inefficient-string-concatenation
* performance-inefficient-vector-operation
* performance-noexcept-move-constructor
* performance-unnecessary-value-param (and improve generator example)
* readability-duplicate-include
* readability-inconsistent-declaration-parameter-name
* readability-non-const-parameter
* readability-redundant-casting
* readability-redundant-member-init
* readability-redundant-smartptr-get
* readability-static-accessed-through-instance
* unused variable in amalgamted tests

src/catch2/internal/catch_commandline.cpp

@@ -47,7 +47,7 @@ namespace Catch {
                     line = trim(line);
                     if( !line.empty() && !startsWith( line, '#' ) ) {
                         if( !startsWith( line, '"' ) )
-                            line = '"' + line + '"';
+                            line = '"' + CATCH_MOVE(line) + '"';
                         config.testsOrTags.push_back( line );
                         config.testsOrTags.emplace_back( "," );
                     }