Fix: minor editorial corrections

Signed-off-by: Tomasz Gromadzki <tomasz.gromadzki@intel.com>

CODING_STYLE.md

@@ -48,13 +48,9 @@ Otherwise, just use `unsigned`, `long`, etc.
 - Make sure you have the right to submit your contribution under the BSD license,
 especially if it is based upon previous work.
 See [CONTRIBUTING.md](https://github.com/pmem/pmdk/blob/master/CONTRIBUTING.md) for details.
-- A copy of the SPDX BSD-3-Clause license reference must be placed at the beginning of each
-source file, script or man page. (Obviously, it does not apply to README's, Visual Studio projects
-and \*.match files.)
-```
-/* SPDX-License-Identifier: BSD-3-Clause */
-/* Copyright <year>, <Name/Company name> */
-```
+- Place a [SPDX short-form identifier](https://spdx.dev/learn/handling-license-info/) for
+the BSD-3-Clause license at the beginning of each new source file, script or man page.
+(Obviously, it does not apply to README's, Visual Studio projects and \*.match files.)
 - When adding a new file to the repo, or when making a contribution to an existing
 file, feel free to put your copyright string on top of it.
 

CONTRIBUTING.md

@@ -15,7 +15,7 @@ or just begin a dialog about the Persistent Memory Development Kit:
 
 **NOTE: If you do decide to implement code changes and contribute them,
 please make sure you agree your contribution can be made available
-under the [BSD-style License used for the Persistent Memory Development Kit](https://github.com/pmem/pmdk/blob/master/LICENSE.txt).**
+under the [BSD-style License used for the Persistent Memory Development Kit](LICENSE.txt).**
 
 **NOTE: Submitting your changes also means that you certify the following:**
 

LICENSE.txt

@@ -33,9 +33,8 @@ with the following exceptions:
 
 * src/core/valgrind/valgrind.h, src/core/valgrind/memcheck.h,
   src/core/valgrind/helgrind.h, src/core/valgrind/drd.h are covered by
-  BSD-style license variants, contained in those files.
+  BSD-style licenses, contained in these files.
 
 * utils/cstyle (used only during development) are covered by the 
   Common Development and Distribution License, described in the CDDL HEADER
-  contained in this file.
-
+  contained in that file.

LICENSE/OPENSOLARIS.LICENSE

@@ -1,10 +1,3 @@
-Unless otherwise noted, all files in this distribution are released
-under the Common Development and Distribution License (CDDL).
-Exceptions are noted within the associated source files.
-
---------------------------------------------------------------------
-
-
 COMMON DEVELOPMENT AND DISTRIBUTION LICENSE Version 1.0
 
 1. Definitions.