Test ref links and optimize YAML headers

Author: olyagpl

documentation/user/Compatibility.md

@@ -3,7 +3,6 @@ layout: docs-experimental
 toc_group: fastr
 link_title: GraalVM R Engine Compatibility
 permalink: /reference-manual/r/Compatibility/
-redirect_from: /docs/reference-manual/r/Compatibility/
 ---
 # GraalVM R Runtime Compatibility
 

documentation/user/ExtensionsSupport.md

@@ -3,7 +3,6 @@ layout: docs-experimental
 toc_group: fastr
 link_title: R Extensions Support
 permalink: /reference-manual/r/ExtensionsSupport/
-redirect_from: /docs/reference-manual/r/ExtensionsSupport/
 ---
 # R Extensions Support
 
@@ -15,7 +14,7 @@ The GraalVM R runtime can run [R extensions](https://cran.r-project.org/doc/manu
 The *native* mode is better suited for code that does not extensively interact with the R API, for example, plain C or Fortran numerical computations working on primitive arrays.
 The *llvm* mode provides significantly better performance for extensions that frequently call between R and the C/C++ code, because GraalVM's LLVM runtime is also partially evaluated like the R code.
 Both can be inlined and optimized as one compilation unit.
-Moreover, GraalVM's LLVM runtime is supported by [GraalVM tools](https://www.graalvm.org/docs/graalvm-tools/) which allows users to, for instance, debug R and C code together.
+Moreover, GraalVM's LLVM runtime is supported by [GraalVM tools](https://www.graalvm.org/tools/) which allows users to, for instance, debug R and C code together.
 
 In one GraalVM R process, any R package can be loaded in either mode.
 That is, GraalVM's R runtime supports mixing packages loaded in the *native* mode with packages loaded in the *llvm* mode in one process.

documentation/user/Interoperability.md

@@ -3,7 +3,6 @@ layout: docs-experimental
 toc_group: fastr
 link_title: Interoperability
 permalink: /reference-manual/r/Interoperability/
-redirect_from: /docs/reference-manual/r/Interoperability/
 ---
 # Interoperability
 

documentation/user/JavaInteroperability.md

@@ -3,7 +3,6 @@ layout: docs-experimental
 toc_group: fastr
 link_title: Interoperability with Java
 permalink: /reference-manual/r/JavaInteroperability/
-redirect_from: /docs/reference-manual/r/JavaInteroperability/
 ---
 # Interoperability with Java
 

documentation/user/ParallelExecution.md

@@ -3,7 +3,6 @@ layout: docs-experimental
 toc_group: fastr
 link_title: Parallel Execution
 permalink: /reference-manual/r/ParallelExecution/
-redirect_from: /docs/reference-manual/r/ParallelExecution/
 ---
 # Parallel Execution
 

documentation/user/Performance.md

@@ -3,7 +3,6 @@ layout: docs-experimental
 toc_group: fastr
 link_title: GraalVM R Engine Performance
 permalink: /reference-manual/r/Performance/
-redirect_from: /docs/reference-manual/r/Performance/
 ---
 # Runtime Performance
 

documentation/user/README.md

@@ -3,7 +3,6 @@ layout: docs-experimental
 toc_group: fastr
 link_title: R Reference
 permalink: /reference-manual/r/
-redirect_from: /docs/reference-manual/languages/r/
 ---
 # GraalVM R Runtime