meson: Apply formatting universally

Now that we have applied the [1] patch, the diff is much
nicer and less noisy.

[1]: https://www.github.com/mesonbuild/meson/pull/14861

src/libexpr-c/meson.build

@@ -1,4 +1,6 @@
-project('nix-expr-c', 'cpp',
+project(
+  'nix-expr-c',
+  'cpp',
   version : files('.version'),
   default_options : [
     'cpp_std=c++2a',
@@ -33,7 +35,7 @@ sources = files(
   'nix_api_value.cc',
 )
 
-include_dirs = [include_directories('.')]
+include_dirs = [ include_directories('.') ]
 
 headers = files(
   'nix_api_expr.h',
@@ -50,7 +52,7 @@ this_library = library(
   sources,
   dependencies : deps_public + deps_private + deps_other,
   include_directories : include_dirs,
-  link_args: linker_export_flags,
+  link_args : linker_export_flags,
   prelink : true, # For C++ static initializers
   install : true,
 )