E203: Don't warn about single whitespace before tuple ,

Author: MichaReiser

crates/ruff_linter/resources/test/fixtures/pycodestyle/E20.py

@@ -147,3 +147,9 @@
 
 #: E203:1:10
 ham[upper  :]
+
+#: Okay
+ham[lower +1 :, "columnname"]
+
+#: E203:1:13
+ham[lower + 1  :, "columnname"]

crates/ruff_linter/src/rules/pycodestyle/rules/logical_lines/extraneous_whitespace.rs

@@ -213,11 +213,11 @@ pub(crate) fn extraneous_whitespace(line: &LogicalLine, context: &mut LogicalLin
                                         diagnostic.range(),
                                     )));
                                     context.push_diagnostic(diagnostic);
-                                } else if iter
-                                    .peek()
-                                    .is_some_and(|token| token.kind() == TokenKind::Rsqb)
-                                {
+                                } else if iter.peek().is_some_and(|token| {
+                                    matches!(token.kind(), TokenKind::Rsqb | TokenKind::Comma)
+                                }) {
                                     // Allow `foo[1 :]`, but not `foo[1  :]`.
+                                    // Or `foo[index :, 2]`, but not `foo[index  :, 2]`.
                                     if let (Whitespace::Many | Whitespace::Tab, offset) = whitespace
                                     {
                                         let mut diagnostic = Diagnostic::new(

crates/ruff_linter/src/rules/pycodestyle/snapshots/ruff_linter__rules__pycodestyle__tests__E203_E20.py.snap

@@ -231,6 +231,8 @@ E20.py:149:10: E203 [*] Whitespace before ':'
 148 | #: E203:1:10
 149 | ham[upper  :]
     |          ^^ E203
+150 | 
+151 | #: Okay
     |
     = help: Remove whitespace before ':'
 
@@ -240,5 +242,21 @@ E20.py:149:10: E203 [*] Whitespace before ':'
 148 148 | #: E203:1:10
 149     |-ham[upper  :]
     149 |+ham[upper:]
+150 150 | 
+151 151 | #: Okay
+152 152 | ham[lower +1 :, "columnname"]
 
+E20.py:155:14: E203 [*] Whitespace before ':'
+    |
+154 | #: E203:1:13
+155 | ham[lower + 1  :, "columnname"]
+    |              ^^ E203
+    |
+    = help: Remove whitespace before ':'
 
+ℹ Safe fix
+152 152 | ham[lower +1 :, "columnname"]
+153 153 | 
+154 154 | #: E203:1:13
+155     |-ham[lower + 1  :, "columnname"]
+    155 |+ham[lower + 1:, "columnname"]