Fix Typos and Improve Documentation Consistency

src/doc/rustc-dev-guide/src/rustdoc-internals/rustdoc-test-suite.md

@@ -20,7 +20,7 @@ Internally, [`compiletest`] invokes the supplementary checker script [`htmldocck
 
 Directives to HtmlDocCk are assertions that place constraints on the generated HTML.
 They look similar to those given to `compiletest` in that they take the form of `//@` comments
-but ultimately, they are completey distinct and processed by different programs.
+but ultimately, they are completely distinct and processed by different programs.
 
 [XPath] is used to query parts of the HTML document tree.
 

src/doc/rustc-dev-guide/src/tests/compiletest.md

@@ -29,7 +29,7 @@ on if or how to run the test, what behavior to expect, and more. See
 [directives](directives.md) and the test suite documentation below for more details
 on these annotations.
 
-See the [Adding new tests](adding.md) and [Best practies](best-practices.md)
+See the [Adding new tests](adding.md) and [Best practise](best-practices.md)
 chapters for a tutorial on creating a new test and advice on writing a good
 test, and the [Running tests](running.md) chapter on how to run the test suite.
 

tests/ui/SUMMARY.md

@@ -410,7 +410,7 @@ These tests revolve around command-line flags which change the way error/warning
 
 ## `tests/ui/diagnostic_namespace/`
 
-Exercises `#[diagnostic::*]` namespaced attributes. See [RFC 3368 Diagnostic attribute namepsace](https://github.com/rust-lang/rfcs/blob/master/text/3368-diagnostic-attribute-namespace.md).
+Exercises `#[diagnostic::*]` namespaced attributes. See [RFC 3368 Diagnostic attribute namespace](https://github.com/rust-lang/rfcs/blob/master/text/3368-diagnostic-attribute-namespace.md).
 
 ## `tests/ui/diagnostic-width/`: `--diagnostic-width`