fix(generic-spacing): improve cases

packages/eslint-plugin-antfu/src/rules/generic-spacing.test.ts

@@ -13,12 +13,24 @@ type Foo<
   `function foo<
   T
 >() {}`,
+  'const foo = <T>(name: T) => name',
+  `interface Log {
+    foo<T>(name: T): void
+  }`,
+  `interface Log {
+  <T>(name: T): void
+}`,
 ]
 const invalids = [
   ['type Foo<T=true> = T', 'type Foo<T = true> = T'],
   ['type Foo<T,K> = T', 'type Foo<T, K> = T'],
   ['type Foo<T=false,K=1|2> = T', 'type Foo<T = false, K = 1|2> = T', 3],
   ['function foo <T>() {}', 'function foo<T>() {}'],
+  [`interface Log {
+  foo <T>(name: T): void
+}`, `interface Log {
+  foo<T>(name: T): void
+}`],
 ] as const
 
 it('runs', () => {

packages/eslint-plugin-antfu/src/rules/generic-spacing.ts

@@ -23,6 +23,7 @@ export default createEslintRule<Options, MessageIds>({
     const sourceCode = context.getSourceCode()
     return {
       TSTypeParameterDeclaration: (node) => {
+        if (!['TSCallSignatureDeclaration', 'ArrowFunctionExpression'].includes(node.parent.type)) {
           const pre = sourceCode.text.slice(0, node.range[0])
           const preSpace = pre.match(/(\s+)$/)?.[0]
           // strip space before <T>
@@ -35,6 +36,7 @@ export default createEslintRule<Options, MessageIds>({
               },
             })
           }
+        }
 
         // add space between <T,K>
         const params = node.params