Restyle codebase

And again clang-format does something I don't like:

-    if (found != end && std::strncmp(found->name, name, len) == 0 && found->name[len] == 0) return found;
+    if (found != end && std::strncmp(found->name, name, len) == 0 && found->name[len] == 0)
+        return found;

I *know* this is a bit of a long line. I would still quite like having
no brace-less multi-line if *ever*. Either put the body on the same
line, or add braces.

Blergh

src/reader.cpp

@@ -3694,7 +3694,7 @@ maybe_t<wcstring> reader_data_t::readline(int nchars_or_0) {
     history_search.reset();
 
     // Get the current terminal modes. These will be restored when the function returns.
-    struct termios old_modes{};
+    struct termios old_modes {};
     if (tcgetattr(conf.in, &old_modes) == -1 && errno == EIO) redirect_tty_output();
 
     // Set the new modes.