Fix typo in --graph-style option

Change "eigth-block" to "eighth-block"

ncdu.pod

@@ -231,9 +231,9 @@ the browser with the 'g' key.
 
 Change the way that the relative size bar column is drawn. Recognized values
 are I<hash> to draw ASCII C<#> characters (most portable), I<half-block> to use
-half-block drawing characters (the default) or I<eigth-block> to use
-eigth-block drawing characters. Eigth-block characters are the most precise but
-may not render correctly in all terminals.
+half-block drawing characters (the default) or I<eighth-block> to use
+eighth-block drawing characters. Eighth-block characters are the most precise
+but may not render correctly in all terminals.
 
 =item B<--shared-column> I<OPTION>
 

src/browser.zig

@@ -238,7 +238,7 @@ const Row = struct {
                 ui.addstr(switch (main.config.graph_style) {
                     .hash  => ([_][:0]const u8{ " ", " ", " ", " ", " ", " ", " ", " ", "#" })[frac],
                     .half  => ([_][:0]const u8{ " ", " ", " ", " ", "▌", "▌", "▌", "▌", "█" })[frac],
-                    .eigth => ([_][:0]const u8{ " ", "▏", "▎", "▍", "▌", "▋", "▊", "▉", "█" })[frac],
+                    .eighth => ([_][:0]const u8{ " ", "▏", "▎", "▍", "▌", "▋", "▊", "▉", "█" })[frac],
                 });
                 num -|= perblock;
             }

src/main.zig

@@ -61,7 +61,7 @@ pub const config = struct {
     pub var show_mtime: bool = false;
     pub var show_graph: bool = true;
     pub var show_percent: bool = false;
-    pub var graph_style: enum { hash, half, eigth } = .half;
+    pub var graph_style: enum { hash, half, eighth } = .half;
     pub var sort_col: SortCol = .blocks;
     pub var sort_order: SortOrder = .desc;
     pub var sort_dirsfirst: bool = false;
@@ -186,7 +186,7 @@ fn argConfig(args: *Args, opt: Args.Option) bool {
         const val = args.arg();
         if (std.mem.eql(u8, val, "hash")) config.graph_style = .hash
         else if (std.mem.eql(u8, val, "half-block")) config.graph_style = .half
-        else if (std.mem.eql(u8, val, "eigth-block")) config.graph_style = .eigth
+        else if (std.mem.eql(u8, val, "eighth-block")) config.graph_style = .eighth
         else ui.die("Unknown --graph-style option: {s}.\n", .{val});
     } else if (opt.is("--sort")) {
         var val: []const u8 = args.arg();