message: Minor cleanup to LangRef, MLIR stands for "Multi-Level IR"
diff: # MLIR Specification
  -MLIR is a compiler intermediate representation with similarities to traditional
  -three-address SSA representations (like
  +MLIR (Multi-Level IR) is a compiler intermediate representation with
  +similarities to traditional three-address SSA representations (like
  [LLVM IR](http://llvm.org/docs/LangRef.html) or
  [SIL](https://github.com/apple/swift/blob/master/docs/SIL.rst)), but which
  introduces notions from polyhedral loop optimization as first-class concepts.
  @@ -11,10 +11,8 @@ data parallel systems. Beyond its representational capabilities, its single
  continuous design provides a framework to lower from dataflow graphs to
  high-performance target-specific code.
  -MLIR stands for one of "Multi-Level IR" or "Multi-dimensional Loop IR" or
  -"Machine Learning IR" - the MLIR team prefers the first interpretation. This
  -document defines and describes the key concepts in MLIR, and is intended to be a
  -dry reference document - [rationale documentation](Rationale.md) and other
  +This document defines and describes the key concepts in MLIR, and is intended to
  +be a dry reference document - [rationale documentation](Rationale.md) and other
  content is hosted elsewhere.
  MLIR is designed to be used in three different forms: a human-readable textual
  