fix(help): I think this fixes a bug?

The existing behavior is hard to explain, so this is the best I've
figured is going on.

src/output/help.rs

@@ -552,20 +552,16 @@ impl<'cmd, 'writer> Help<'cmd, 'writer> {
             self.none(NEXT_LINE_INDENT);
         }
 
-        let trailing_indent = if next_line_help {
+        let spaces = if next_line_help {
             TAB.len() + NEXT_LINE_INDENT.len()
         } else if let Some(true) = arg.map(|a| a.is_positional()) {
             longest + TAB_WIDTH * 2
         } else {
             longest + TAB_WIDTH * 3
         };
+        let trailing_indent = spaces; // Don't indent any further than the first line is indented
         let trailing_indent = self.get_spaces(trailing_indent);
 
-        let spaces = if next_line_help {
-            TAB.len() + NEXT_LINE_INDENT.len()
-        } else {
-            longest + TAB_WIDTH * 3
-        };
         let mut help = about.clone();
         help.replace_newline();
         if !spec_vals.is_empty() {
@@ -590,7 +586,6 @@ impl<'cmd, 'writer> Help<'cmd, 'writer> {
         help.indent("", &trailing_indent);
         let help_is_empty = help.is_empty();
         self.writer.extend(help.into_iter());
-
         if let Some(arg) = arg {
             const DASH_SPACE: usize = "- ".len();
             const COLON_SPACE: usize = ": ".len();

tests/builder/help.rs

@@ -755,8 +755,8 @@ Arguments:
               symbols.
               l, long           Copy-friendly, 14
               characters, contains symbols.
-              m, med, medium    Copy-friendly, 8
-              characters, contains symbols.
+              m, med, medium    Copy-friendly, 8 characters,
+              contains symbols.
 
 Options:
     -h, --help       Print help information