Insert a little more sanity

src/Editor.php

@@ -277,7 +277,6 @@ class Editor {
 
 			// Truncate the previous row
 			$row->chars = $newChars;
-			$row->update();
 
 			// Add a new row, with the contents from the cursor to the end of the line
 			$this->insertRow($this->cursorY + 1, substr($chars, $this->cursorX), FALSE);

src/Row.php

@@ -256,28 +256,8 @@ class Row {
 
 	public function update(): void
 	{
-		$idx = 0;
-
-		// Make sure the render buffer is empty before updating
-		// otherwise, you will have persistent output where you
-		// don't want it.
-		$this->render = '';
-
-		for ($i = 0; $i < $this->size; $i++)
-		{
-			if ($this->chars[$i] === "\t")
-			{
-				$this->render[$idx++] = ' ';
-				while ($idx % KILO_TAB_STOP !== 0)
-				{
-					$this->render[$idx++] = ' ';
-				}
-			}
-			else
-			{
-				$this->render[$idx++] = $this->chars[$i];
-			}
-		}
+		$replacement = str_repeat(' ', KILO_TAB_STOP);
+		$this->render = str_replace("\t", $replacement, $this->chars);
 
 		$this->updateSyntax();
 	}