Fix flake8 E201 in edge_detection kernel literals (#3675)

.claude/sweep-style-state.csv

@@ -7,6 +7,7 @@ convolution,2026-07-02,,HIGH,3;4,"Cat 3 F401: unused not_implemented_func import
 cost_distance,2026-06-15,3339,HIGH,1;3;4;5,"Cat 3 F401: removed unused 'from functools import partial' (L32, refactor leftover, not re-exported). Cat 5 mutable default target_values: list = [] was found here too, but the parallel api-consistency PR #3348 fixed it first (same None-sentinel normalization, merged to main); on reconciliation this PR's duplicate source change and its two target_values tests were dropped, so PR #3350 is now lint-only. Cat 1: E302 L63 (1->2 blank lines before @ngjit _heap_push; placed blanks between comment divider and decorator to satisfy both E302 and isort) + E127 x5 (_cost_distance_dask_cupy L461-462, _cost_distance_dask_iterative L1005-1007 signature continuation over-indent). Cat 4 isort: dataset_support before utils, utils from-import reflowed to 100 cols. Cat 2 grep clean. flake8+isort clean on module after fix; cost_distance tests pass (CUDA available). Pre-existing test-file lint (F401 L314/L504, E201 L449, isort drift) left untouched - out of module scope. PR open."
 dasymetric,2026-06-20,3411,HIGH,1;3;4,"F401 is_dask_cupy unused (HIGH); E128 line 323 continuation indent (MED); isort utils import block (MED). Fixed + flake8/isort clean, 61 tests pass. PR #3411. Issue-create was denied by auto-mode classifier (judged LOW); PR went through."
 diffusion,2026-06-20,3421,HIGH,3;4,F401 unused not_implemented_func (HIGH); isort import-ordering drift (MEDIUM); no Cat1/2/5. Fixed in PR off issue 3421.
+edge_detection,2026-07-18,3675,MEDIUM,1;4,"flake8 baseline 4: E201 x4 on SOBEL_Y/PREWITT_Y kernel literals (leading space aligned columns under the -1 rows); dropped the space to match LAPLACIAN_KERNEL style in the same file, kernels numerically unchanged. Module isort clean. Test file fixed in same PR: E302 before first fixture + isort import-block reflow to line_length=100. Cat 2/3/5 clean (grep: no bare except, mutable defaults, ==None/True, or shadowed builtins). flake8+isort clean after fix; 87 edge_detection tests pass (CUDA available). Issue #3675."
 fire,2026-06-19,3395,HIGH,3;4,Cat3 F401 math.log unused + F841 S_T unused local; Cat4 isort utils import reorder. No Cat1/2/5. Fixed in #3395 rockout.
 focal,2026-05-29,2731,HIGH,3;4;5,"F401 not_implemented_func (import line 36, unused, not re-exported). isort: stdlib reorder (import math before from-imports), dropped stray blank lines in import groups, alphabetised+rewrapped convolution/utils from-imports, moved dataset_support import into order. Cat 5: mutable default excludes=[np.nan] in mean() (line 238) -> None sentinel, resolved to [np.nan] in body; never mutated so behaviour preserved; regression test test_mean_default_excludes_does_not_leak added. Cat 1/2 clean. 115 focal tests pass. PR pending."
 geotiff,2026-07-02,,,,"Re-sweep 2026-07-02 (deep-sweep). flake8 baseline 0 and isort clean across all 29 source files (setup.cfg max-line-length=100, isort line_length=100). Cat 1/2/3/4 all clean. Cat 5 grep clean: no bare except, no mutable defaults, no ==None/True/False in code; shadow-grep hits are type annotations (seen: list, attrs: dict), the getaddrinfo type= kwarg in _sources.py, and QML/XML template strings in _symbology.py - all false positives. Prior #3537 isort drift already fixed (see 2026-07-01 row / #3588). No findings; no /rockout."

xrspatial/edge_detection.py

@@ -10,17 +10,17 @@
                     [-1, 0, 1]], dtype=np.float64)
 
 SOBEL_Y = np.array([[-1, -2, -1],
-                    [ 0,  0,  0],
-                    [ 1,  2,  1]], dtype=np.float64)
+                    [0,  0,  0],
+                    [1,  2,  1]], dtype=np.float64)
 
 # -- Prewitt kernels ---------------------------------------------------------
 PREWITT_X = np.array([[-1, 0, 1],
                       [-1, 0, 1],
                       [-1, 0, 1]], dtype=np.float64)
 
 PREWITT_Y = np.array([[-1, -1, -1],
-                      [ 0,  0,  0],
-                      [ 1,  1,  1]], dtype=np.float64)
+                      [0,  0,  0],
+                      [1,  1,  1]], dtype=np.float64)
 
 # -- Laplacian kernel --------------------------------------------------------
 LAPLACIAN_KERNEL = np.array([[0,  1, 0],

xrspatial/tests/test_edge_detection.py

@@ -2,23 +2,18 @@
 import pytest
 import xarray as xr
 
-from xrspatial.edge_detection import (
-    LAPLACIAN_KERNEL, PREWITT_X, PREWITT_Y, SOBEL_X, SOBEL_Y,
-    laplacian, prewitt_x, prewitt_y, sobel_x, sobel_y,
-)
-from xrspatial.tests.general_checks import (
-    assert_boundary_mode_correctness,
-    assert_numpy_equals_dask_numpy,
-    create_test_raster,
-    cuda_and_cupy_available,
-    dask_array_available,
-    general_output_checks,
-)
+from xrspatial.edge_detection import (LAPLACIAN_KERNEL, PREWITT_X, PREWITT_Y, SOBEL_X, SOBEL_Y,
+                                      laplacian, prewitt_x, prewitt_y, sobel_x, sobel_y)
+from xrspatial.tests.general_checks import (assert_boundary_mode_correctness,
+                                            assert_numpy_equals_dask_numpy, create_test_raster,
+                                            cuda_and_cupy_available, dask_array_available,
+                                            general_output_checks)
 
 # ---------------------------------------------------------------------------
 # Fixtures
 # ---------------------------------------------------------------------------
 
+
 @pytest.fixture
 def ramp_data():
     """5x6 ramp: values increase left-to-right, constant top-to-bottom."""