Some grammer.

docs/build.rst

@@ -82,8 +82,8 @@ Build
 -----
 
 bgfx uses `GENie - Project generator tool <https://github.com/bkaradzic/genie#genie---project-generator-tool>`__
-to generate project files for various platform. Binaries for Linux, macOS, and Windows are included in
-bx repository. GENie can generate a useful list of options relevant to the project using the
+to generate project files for various platforms. Binaries of GENie for Linux, macOS, and Windows are included in
+the bx repository. GENie can generate a useful list of options relevant to the project using the
 ``--help`` flag. Most platform-specific examples below do not explicitly use the ``genie`` executable, but a convenience
 makefile instead. For more control, you can directly use ``genie`` to generate the project files.
 
@@ -95,9 +95,9 @@ General (Makefile wrapper)
     cd bgfx
     make
 
-After calling ``make``, ``.build/projects/\*`` directory will be generated.
-All intermediate files generated by compiler will be inside .build
-directory structure. Deleting .build directory at any time is safe.
+After calling ``make``, some directories in ``.build/projects/\*`` will be generated.
+All intermediate files, libraries and executables generated by the compiler will be inside this
+``.build`` directory structure. Deleting ``.build`` directory at any time is safe.
 
 ::
 
@@ -113,7 +113,7 @@ Configuration is ``<platform>-<debug/release>[32/64]``. For example:
 General (Directly with GENie)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-Inspect the available options (where ``<platform>`` is ``linux``, ``windows``, or ``darwin``):
+Inspect the available options by invoking GENie with the ``--help`` option (where ``<platform>`` is ``linux``, ``windows``, or ``darwin``):
 ::
 
     ../bx/tools/bin/<platform>/genie --help
@@ -193,7 +193,7 @@ Or for Xcode IDE:
     ../bx/tools/bin/darwin/genie --with-combined-examples --xcode=osx xcode9
     open .build/projects/xcode9-osx/bgfx.xcworkspace
 
-Due to `inability <https://github.com/bkaradzic/genie/blob/master/docs/scripting-reference.md#debugdirpath>`__
+Due to the `inability <https://github.com/bkaradzic/genie/blob/master/docs/scripting-reference.md#debugdirpath>`__
 to set working directory for an Xcode project from `GENie <https://github.com/bkaradzic/genie#genie---project-generator-tool>`__
 configuration file, it has to be set manually for each example project:
 
@@ -227,12 +227,12 @@ Build the resulting solution and deploy to device.
 Amalgamated Build
 -----------------
 
-For ease of integration to other build system bgfx library can be built
-with single .cpp file. It's only necessary to build
+For ease of integration with other build systems, the bgfx library can be built
+with a single .cpp file. It's only necessary to build
 `src/amalgamated.cpp <https://github.com/bkaradzic/bgfx/blob/master/src/amalgamated.cpp>`__
 (for macOS/iOS/iPadOS/tvOS use
 `src/amalgamated.mm <https://github.com/bkaradzic/bgfx/blob/master/src/amalgamated.mm>`__
-instead) inside different build system.
+instead) inside a different build system.
 
 Tools
 -----