docs: meson -> Meson

Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6915>
diff --git a/docs/debugging.rst b/docs/debugging.rst
index 1e90c52..d59465a 100644
--- a/docs/debugging.rst
+++ b/docs/debugging.rst
@@ -8,7 +8,7 @@
 to stdout whenever an error occurs.
 
 More extensive error checking is done in DEBUG builds
-(``--buildtype debug`` for meson, ``build=debug`` for scons).
+(``--buildtype debug`` for Meson, ``build=debug`` for scons).
 
 In your debugger you can set a breakpoint in ``_mesa_error()`` to trap
 Mesa errors.
diff --git a/docs/install.rst b/docs/install.rst
index 3355002..0ea14b7 100644
--- a/docs/install.rst
+++ b/docs/install.rst
@@ -16,7 +16,7 @@
 Build system
 ^^^^^^^^^^^^
 
--  `meson <https://mesonbuild.com>`__ is required when building on \*nix
+-  `Meson <https://mesonbuild.com>`__ is required when building on \*nix
    platforms and is supported on windows.
 -  `SCons <http://www.scons.org/>`__ is an alternative for building on
    Windows and Linux.
diff --git a/docs/meson.rst b/docs/meson.rst
index 340287a..8868af7 100644
--- a/docs/meson.rst
+++ b/docs/meson.rst
@@ -38,7 +38,7 @@
 
    sudo dnf install meson   # Fedora
 
-Some older versions of meson do not check that they are too old and will
+Some older versions of Meson do not check that they are too old and will
 error out in odd ways.
 
 You'll also need `Ninja <https://ninja-build.org/>`__. If it's not
@@ -48,9 +48,9 @@
 Windows
 ^^^^^^^
 
-You will need to install python3 and meson as a module using pip. This
+You will need to install python3 and Meson as a module using pip. This
 is because we use python for generating code, and rely on external
-modules (mako). You also need pkg-config (a hard dependency of meson),
+modules (mako). You also need pkg-config (a hard dependency of Meson),
 flex, and bison. The easiest way to install everything you need is with
 `chocolatey <https://chocolatey.org/>`__.
 
@@ -65,19 +65,19 @@
 
    choco install ninja mingw
 
-Then install meson using pip
+Then install Meson using pip
 
 .. code-block:: console
 
    py -3 -m pip install meson mako
 
 You may need to add the python3 scripts directory to your path for
-meson.
+Meson.
 
 2. Basic Usage
 --------------
 
-The meson program is used to configure the source directory and
+The Meson program is used to configure the source directory and
 generates either a ninja build file or Visual Studio® build files. The
 latter must be enabled via the ``--backend`` switch, as ninja is the
 default backend on all operating systems.
@@ -150,15 +150,15 @@
 clang-cl, or ICL (the Intel Compiler), read on.
 
 Both ICL and MSVC come with shell environments, the easiest way to use
-meson with these it to open a shell. For clang-cl you will need to open
+Meson with these it to open a shell. For clang-cl you will need to open
 an MSVC shell, and then override the compilers, either using a `native
 file <https://mesonbuild.com/Native-environments.html>`__, or with the
 CC and CXX environment variables.
 
 All of these compilers are tested and work with ninja, but if you want
 visual studio integration or you just like msbuild, passing
-``--backend=vs`` to meson will generate a visual studio solution. If you
-want to use ICL or clang-cl with the vsbackend you will need meson
+``--backend=vs`` to Meson will generate a visual studio solution. If you
+want to use ICL or clang-cl with the vsbackend you will need Meson
 0.52.0 or greater. Older versions always use the microsoft compiler.
 
 3. Advanced Usage
@@ -230,18 +230,18 @@
 Meson includes upstream logic to wrap llvm-config using its standard
 dependency interface.
 
-As of meson 0.51.0 meson can use cmake to find LLVM (the cmake finder
-was added in meson 0.49.0, but LLVM cannot be found until 0.51) Due to
+As of Meson 0.51.0 Meson can use cmake to find LLVM (the cmake finder
+was added in Meson 0.49.0, but LLVM cannot be found until 0.51) Due to
 the way LLVM implements its cmake finder it will only find static
 libraries, it will never find libllvm.so. There is also a
-``-Dcmake_module_path`` option in this meson version, which points to
+``-Dcmake_module_path`` option in this Meson version, which points to
 the root of an alternative installation (the prefix). For example:
 
 .. code-block:: console
 
    meson builddir -Dcmake_module_path=/home/user/mycmake/prefix
 
-As of meson 0.49.0 meson also has the concept of a `"native
+As of Meson 0.49.0 Meson also has the concept of a `"native
 file" <https://mesonbuild.com/Native-environments.html>`__, these files
 provide information about the native build environment (as opposed to a
 cross build environment). They are ini formatted and can override where
@@ -254,7 +254,7 @@
    [binaries]
    llvm-config = '/usr/local/bin/llvm/llvm-config'
 
-Then configure meson:
+Then configure Meson:
 
 .. code-block:: console
 
@@ -284,7 +284,7 @@
 
 Obviously, only cmake or llvm-config is required.
 
-Then configure meson:
+Then configure Meson:
 
 .. code-block:: console
 
@@ -373,7 +373,7 @@
 Options
 ^^^^^^^
 
-One of the oddities of meson is that some options are different when
+One of the oddities of Meson is that some options are different when
 passed to the ``meson`` than to ``meson configure``. These options are
 passed as --option=foo to ``meson``, but -Doption=foo to
 ``meson configure``. Mesa defined options are always passed as
@@ -385,18 +385,18 @@
    This option will set the compiler debug/optimisation levels to aid
    debugging the Mesa libraries.
 
-   Note that in meson this defaults to ``debugoptimized``, and not
+   Note that in Meson this defaults to ``debugoptimized``, and not
    setting it to ``release`` will yield non-optimal performance and
    binary size. Not using ``debug`` may interfere with debugging as some
    code and validation will be optimized away.
 
    For those wishing to pass their own optimization flags, use the
-   ``plain`` buildtype, which causes meson to inject no additional
+   ``plain`` buildtype, which causes Meson to inject no additional
    compiler arguments, only those in the C/CXXFLAGS and those that mesa
    itself defines.
 
 ``-Db_ndebug``
-   This option controls assertions in meson projects. When set to
+   This option controls assertions in Meson projects. When set to
    ``false`` (the default) assertions are enabled, when set to true they
    are disabled. This is unrelated to the ``buildtype``; setting the
    latter to ``release`` will not turn off assertions.