Improve various README.md files.

compiler/README.md

@@ -1,3 +1,5 @@
+# GraalVM Compiler
+
 The GraalVM compiler is a dynamic compiler written in Java that integrates with the HotSpot JVM. It has a focus on high performance and extensibility.
 In addition, it provides optimized performance for languages implemented with [Truffle Framework](https://github.com/graalvm/graal/tree/master/truffle)-based languages running on the JVM.
 For brevity, the GraalVM compiler is often referred to as "the compiler" below.
@@ -165,7 +167,7 @@ Without leaving the `graal/vm` directory, you can now run libgraal as follows:
 
 ## Publications and Presentations
 
-For video tutorials, presentations and publications on the GraalVM compiiler visit the [Publications](../docs/Publications.md) page.
+For video tutorials, presentations and publications on the GraalVM compiler visit the [Publications](../docs/Publications.md) page.
 
 ## Building JVMCI JDK 8
 

sdk/README.md

@@ -1,4 +1,4 @@
-# Graal Standard Development Kit
+# GraalVM Standard Development Kit
 
 The GraalVM SDK is a collection of APIs for the components of GraalVM.
 

sulong/README.md

@@ -1,3 +1,5 @@
+# Sulong
+
 Sulong is a high-performance LLVM bitcode runtime built on the
 [GraalVM](https://www.graalvm.org) by [Oracle Labs](https://labs.oracle.com).
 
@@ -8,15 +10,15 @@ With Sulong you can execute programming languages that can be transformed
 to LLVM bitcode on GraalVM. This includes languages like C/C++, Fortran, and others.
 
 
-# User Documentation
+## User Documentation
 
 Sulong is part of [GraalVM](https://www.graalvm.org). If you are a user of GraalVM and want
 to run C/C++/... programs on GraalVM, we recommend downloading a pre-built binary of
 [GraalVM](https://www.graalvm.org/downloads).
 
 See [GraalVM LLVM Runtime](../docs/reference-manual/llvm/README.md) and [graalvm.org](https://www.graalvm.org/reference-manual/llvm/) for documentation about using the GraalVM LLVM runtime.
 
-# Contributor Documentation
+## Contributor Documentation
 
 If you are interested in the internals of Sulong, or want to contribute, there are those
 resources:
@@ -30,7 +32,7 @@ resources:
 * [FAQ](docs/contributor/FAQ.md)
 
 
-# Further Information
+## Further Information
 
 Sulong is developed in a research collaboration with
 [Johannes Kepler University, Linz](http://www.ssw.jku.at).

truffle/README.md

@@ -9,7 +9,7 @@ forward in programming language implementation technology in the current era of
 A growing  body of shared implementation code and services
 reduces language implementation effort significantly, but leads to competitive runtime
 performance that matches or exceeds the competition.  The value of the platform is further
-increased by support for low-overhead language interoperation, as well as a general instrumentation
+increased by support for low-overhead language interoperability, as well as a general instrumentation
 framework that supports multi-language debugging and other external developer tools.
 
 Truffle is developed and maintained by Oracle Labs and the Institute for System

vm/README.md

@@ -1,4 +1,4 @@
-# VM suite
+# VM Suite
 
 The VM suite allows you to build custom GraalVM distributions, as well as installable components.
 It defines a base GraalVM distribution that contains the JVMCI-enabled JDK, the GraalVM SDK, Truffle, and the GraalVM component installer.

wasm/README.md

@@ -12,7 +12,7 @@ Feedback, bug reports, and open-source contributions are welcome!
 
 ## Building GraalWasm
 
-### Prerequisits
+### Prerequisites
 
 - Python 3 (required by `mx`)
 - git (to download, update, and locate repositories)
@@ -313,6 +313,6 @@ Value mainFunction = context.getBindings("wasm").getMember("example").getMember(
 mainFunction.execute();
 ```
 
-For more Polyglot-related examples, consult the documentation at the
+For more polyglot-related examples, consult the documentation at the
 [GraalVM website](https://www.graalvm.org/docs/reference-manual/polyglot/).