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.

1 files changed, 3 insertions, 4 deletions

diff --git a/src/builtin_set.cpp b/src/builtin_set.cpp
index 2bc60d8b..f4f49baf 100644
--- a/src/builtin_set.cpp
+++ b/src/builtin_set.cpp
@@ -412,12 +412,11 @@ int builtin_set(parser_t &parser, io_streams_t &streams, wchar_t **argv) {
                 builtin_print_help(parser, streams, argv[0], streams.out);
                 return 0;
             }
-            case '?':
+            case '?': {
                 builtin_unknown_option(parser, streams, argv[0], argv[w.woptind - 1]);
                 return 1;
-
-            default:
-                break;
+            }
+            default: { break; }
         }
     }