[pycodestyle] Fix duplicated diagnostic in E712 (#17651)

Author: LaBatata101

crates/ruff_linter/resources/test/fixtures/pycodestyle/E712.py

@@ -53,3 +53,7 @@
 assert (not foo) in bar
 assert {"x": not foo} in bar
 assert [42, not foo] in bar
+
+# https://github.com/astral-sh/ruff/issues/17582
+if True == True: # No duplicated diagnostic
+    pass

crates/ruff_linter/src/rules/pycodestyle/rules/literal_comparisons.rs

@@ -311,6 +311,16 @@ pub(crate) fn literal_comparisons(checker: &Checker, compare: &ast::ExprCompare)
                 if let Expr::BooleanLiteral(ast::ExprBooleanLiteral { value, .. }) = next {
                     match op {
                         EqCmpOp::Eq => {
+                            if let Expr::BooleanLiteral(ast::ExprBooleanLiteral {
+                                value: comparator_value,
+                                ..
+                            }) = comparator
+                            {
+                                if value == comparator_value {
+                                    continue;
+                                }
+                            }
+
                             let cond = if compare.ops.len() == 1 {
                                 Some(SourceCodeSnippet::from_str(
                                     checker.locator().slice(comparator),

crates/ruff_linter/src/rules/pycodestyle/snapshots/ruff_linter__rules__pycodestyle__tests__E712_E712.py.snap

@@ -265,3 +265,20 @@ E712.py:31:4: E712 [*] Avoid equality comparisons to `True`; use `if yield i:` f
 32 32 |       print("even")
 33 33 | 
 34 34 | #: Okay
+
+E712.py:58:4: E712 [*] Avoid equality comparisons to `True`; use `if True:` for truth checks
+   |
+57 | # https://github.com/astral-sh/ruff/issues/17582
+58 | if True == True: # No duplicated diagnostic
+   |    ^^^^^^^^^^^^ E712
+59 |     pass
+   |
+   = help: Replace with `True`
+
+ℹ Unsafe fix
+55 55 | assert [42, not foo] in bar
+56 56 | 
+57 57 | # https://github.com/astral-sh/ruff/issues/17582
+58    |-if True == True: # No duplicated diagnostic
+   58 |+if True: # No duplicated diagnostic
+59 59 |     pass