added info in header files & fixed newline

Author: dbudii

mlir/include/mlir/Query/Matcher/MatchFinder.h

@@ -1,4 +1,14 @@
+//===- MatchFinder.h - ------------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
 //===----------------------------------------------------------------------===//
+//
+// This file contains the MatchFinder class, which is used to find operations
+// that match a given matcher and print them.
+//
 // MatchFinder.h
 //===----------------------------------------------------------------------===//
 

mlir/include/mlir/Query/Matcher/MatchersInternal.h

@@ -1,11 +1,23 @@
-//===- MatchersInternal.h - Structural query framework ----------*- C++ -*-===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Implements the base layer of the matcher framework.
+//
+// Matchers are methods that return a Matcher which provides a method
+// match(Operation *op)
+// match(Operation *op, SetVector<Operation *> &matchedOps, QueryOptions
+// &options)
+//
+// The matcher functions are defined in include/mlir/IR/Matchers.h.
+// This file contains the wrapper classes needed to construct matchers for
+// mlir-query.
 // SPDX-License-Identifier: Apache-2.0 WItH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
-
 #ifndef MLIR_TOOLS_MLIRQUERY_MATCHER_MATCHERSINTERNAL_H
 #define MLIR_TOOLS_MLIRQUERY_MATCHER_MATCHERSINTERNAL_H
 

mlir/lib/Query/Query.cpp

@@ -156,4 +156,4 @@ LogicalResult MatchQuery::run(llvm::raw_ostream &os, QuerySession &qs) const {
   return mlir::success();
 }
 
-} // namespace mlir::query
+} // namespace mlir::query