fix: add keybinding to insert space on Ctrl+Space

aider/io.py

@@ -15,9 +15,10 @@ from prompt_toolkit.styles import Style
 from pygments.lexers import MarkdownLexer, guess_lexer_for_filename
 from pygments.token import Token
 from rich.console import Console
+from rich.markdown import Markdown
 from rich.style import Style as RichStyle
 from rich.text import Text
-from rich.markdown import Markdown
+
 from aider.mdstream import MarkdownStream
 
 from .dump import dump  # noqa: F401
@@ -339,6 +340,11 @@ class InputOutput:
 
         kb = KeyBindings()
 
+        @kb.add("c-space")
+        def _(event):
+            "Ignore Ctrl when pressing space bar"
+            event.current_buffer.insert_text(" ")
+
         @kb.add("escape", "c-m", eager=True)
         def _(event):
             event.current_buffer.insert_text("\n")