space before colon

Co-authored-by: Zach McKenzie <92116279+zm711@users.noreply.github.com>

Author: JoeZiminski

src/spikeinterface/core/generate.py

@@ -1089,11 +1089,11 @@ def __init__(
         self,
         num_channels: int,
         sampling_frequency: float,
-        durations: list[float],
-        noise_levels: float | np.array = 1.0,
-        cov_matrix: np.array | None = None,
-        dtype: np.dtype | str | None = "float32",
-        seed: int | None = None,
+        durations : list[float],
+        noise_levels : float | np.array = 1.0,
+        cov_matrix : np.array | None = None,
+        dtype : np.dtype | str | None = "float32",
+        seed : int | None = None,
         strategy: Literal["tile_pregenerated", "on_the_fly"] = "tile_pregenerated",
         noise_block_size: int = 30000,
     ):