restyle switch blocks to match project style

I missed restyling a few "switch" blocks to make them consistent with the rest
of the code base. This fixes that oversight. This should be the final step in
restyling the C++ code to have a consistent style. This also includes a few
trivial cleanups elsewhere.

I also missed restyling the "complete" module when working my way from a to z
so this final change includes restyling that module.

Total lint errors decreased 36%. Cppcheck errors went from 47 to 24. Oclint P2
errors went from 819 to 778. Oclint P3 errors went from 3252 to 1842.

Resolves #2902.

src/tokenizer.cpp

@@ -686,8 +686,7 @@ bool move_word_state_machine_t::consume_char_path_components(wchar_t c) {
             case s_separator: {
                 if (!iswspace(c) && !is_path_component_character(c)) {
                     consumed = true;  // consumed separator
-                }
-                else {
+                } else {
                     state = s_end;
                 }
                 break;