posssible speedup of screenshots

Author: willmcgugan

src/textual/_doc.py

@@ -47,7 +47,7 @@ def format_svg(source, language, css_class, options, md, attrs, **kwargs) -> str
 def take_svg_screenshot(
     app: App | None = None,
     app_path: str | None = None,
-    press: Iterable[str] = ("_",),
+    press: Iterable[str] = (),
     title: str | None = None,
     terminal_size: tuple[int, int] = (80, 24),
 ) -> str:

src/textual/pilot.py

@@ -35,7 +35,8 @@ async def press(self, *keys: str) -> None:
             *key: Keys to press.
 
         """
-        await self._app._press_keys(keys)
+        if keys:
+            await self._app._press_keys(keys)
 
     async def pause(self, delay: float = 50 / 1000) -> None:
         """Insert a pause.