fix tab behavior, should not print

docs/sequences.md

@@ -19,3 +19,4 @@ Status meanings:
 | `ENQ` | `0x05` | [Enquiry](sequences/enq.md) | ✅ |
 | `BEL` | `0x07` | [Bell](sequences/bel.md) | ❌ |
 | `BS` | `0x08` | [Backspace](sequences/bs.md) | ⚠️ |
+| `TAB` | `0x09` | [Tab](sequences/tab.md) | ⚠️ |

docs/sequences/tab.md

@@ -0,0 +1,21 @@
+# Tab
+
+|     |   |
+| --- | --- |
+| Text |        |
+| Hex  | `0x09`   |
+
+Move the cursor right to the next tab stop.
+
+A tab stop is a specifically marked column that a cursor stops when a tab
+is invoked. Tab stops are typically thought of as uniform spacing (i.e.
+four spaces) but in terminals this is not the case: tab stops can be set
+at any column number using the [tab set](#) and [tab clear](#)
+sequences.
+
+Initially, tab stops are set on every 8th column.
+
+## TODO
+
+  * Integration with left/right margins of the scrolling region.
+  * How does horizontal tab interact with the pending wrap state?

src/terminal/Terminal.zig

@@ -543,8 +543,8 @@ pub fn horizontalTab(self: *Terminal) !void {
     defer tracy.end();
 
     while (self.cursor.x < self.cols) {
-        // Clear
-        try self.print(' ');
+        // Move the cursor right
+        self.cursor.x += 1;
 
         // If the last cursor position was a tabstop we return. We do
         // "last cursor position" because we want a space to be written