render tabs in diff (closes #12)

README.md

@@ -65,6 +65,4 @@ GITUI_LOGGING=true gitui
 
 * https://github.com/jesseduffield/lazygit
 * https://github.com/jonas/tig
-* https://github.com/git-up/GitUp (would be nice to comeup with a way to have the map view available in a terminal tool)
-
-test
+* https://github.com/git-up/GitUp (would be nice to comeup with a way to have the map view available in a terminal tool)

src/components/diff.rs

@@ -244,7 +244,8 @@ impl DiffComponent {
             // weird eof missing eol line
             format!("{}\n", line.content.trim_matches('\n'))
         };
-        let content = Cow::from(filled);
+        //TODO: allow customize tabsize
+        let content = Cow::from(filled.replace("\t", "  "));
 
         text.push(match line.line_type {
             DiffLineType::Delete => {