Add/update GUI test for impl indent fix

tests/rustdoc-gui/docblock-table-overflow.goml

@@ -11,7 +11,7 @@ assert-property: (".top-doc .docblock table", {"scrollWidth": "1572"})
 // Checking it works on other doc blocks as well...
 
 // Logically, the ".docblock" and the "<p>" should have the same scroll width (if we exclude the margin).
-assert-property: ("#implementations-list > details .docblock", {"scrollWidth": 816})
+assert-property: ("#implementations-list > details .docblock", {"scrollWidth": 835})
 assert-property: ("#implementations-list > details .docblock > p", {"scrollWidth": 835})
 // However, since there is overflow in the <table>, its scroll width is bigger.
 assert-property: ("#implementations-list > details .docblock table", {"scrollWidth": "1572"})

tests/rustdoc-gui/impl-doc-indent.goml

@@ -0,0 +1,16 @@
+// Checks the impl block docs have the correct indent.
+go-to: "file://" + |DOC_PATH| + "/test_docs/impls_indent/struct.Context.html"
+
+// First we ensure that the impl items are indent (more on the right of the screen) than the
+// impl itself.
+store-position: ("#impl-Context", {"x": impl_x})
+store-position: ("#impl-Context > .item-info", {"x": impl_item_x})
+assert: |impl_x| < |impl_item_x|
+
+// And we ensure that all impl items have the same indent.
+assert-position: ("#impl-Context > .docblock", {"x": |impl_item_x|})
+assert-position: ("#impl-Context + .docblock", {"x": |impl_item_x|})
+
+// Same with the collapsible impl block.
+assert-position: ("#impl-Context-1 > .docblock", {"x": |impl_item_x|})
+assert-position: (".implementors-toggle > summary + .docblock", {"x": |impl_item_x|})

tests/rustdoc-gui/item-info-overflow.goml

@@ -21,7 +21,7 @@ compare-elements-property: (
 )
 assert-property: (
     "#impl-SimpleTrait-for-LongItemInfo2 .item-info",
-    {"scrollWidth": "916"},
+    {"scrollWidth": "935"},
 )
 // Just to be sure we're comparing the correct "item-info":
 assert-text: (

tests/rustdoc-gui/src/test_docs/lib.rs

@@ -740,3 +740,29 @@ pub mod SidebarSort {
     impl Sort for Cell<u8> {}
     impl<'a> Sort for &'a str {}
 }
+
+pub mod impls_indent {
+    pub struct Context;
+
+    /// Working with objects.
+    ///
+    /// # Safety
+    ///
+    /// Functions that take indices of locals do not check bounds on these indices;
+    /// the caller must ensure that the indices are less than the number of locals
+    /// in the current stack frame.
+    impl Context {
+    }
+
+    /// Working with objects.
+    ///
+    /// # Safety
+    ///
+    /// Functions that take indices of locals do not check bounds on these indices;
+    /// the caller must ensure that the indices are less than the number of locals
+    /// in the current stack frame.
+    impl Context {
+        /// bla
+        pub fn bar() {}
+    }
+}