[lldb] Fix output of `help format` (#190409)
The output currently contains
```
"unicode32"
'u' or "unsigned decimal"
'p' or
"pointer"
"char[]"
"int8_t[]"
```
The 'p' and "pointer" are supposed to appear on the same line. When
we're about to print "pointer," we check whether it would exceed the
column limit (in which case, we insert a line feed). This check only
checks for spaces as separators, but in this case, "words" may be
separated by newlines as well. Look for them too.
