[meson] Remove spaces before named parameter colons

meson documentations sometimes adds the space and sometimes don't and we
aren't adding it most of the times unconsciously so let's the cases and
be consistent.
diff --git a/meson.build b/meson.build
index 1d8e25e..32758db 100644
--- a/meson.build
+++ b/meson.build
@@ -1,6 +1,6 @@
 project('harfbuzz', 'c', 'cpp',
   meson_version: '>= 0.53.0',
-  default_options : ['cpp_std=c++11'],
+  default_options: ['cpp_std=c++11'],
   version: '2.6.7')
 
 warning('Meson is not our main build system yet, don\'t use it for packaging HarfBuzz for *nix distros for now')
@@ -36,25 +36,25 @@
       '/wd4305', # truncating type conversion (e.g. double -> float)
       cpp.get_supported_arguments(['/utf-8']), # set the input encoding to utf-8
   ]
-  add_project_arguments(msvc_args, language : ['c', 'cpp'])
+  add_project_arguments(msvc_args, language: ['c', 'cpp'])
   # Disable SAFESEH with MSVC for libs that use external deps that are built with MinGW
   # noseh_link_args = ['/SAFESEH:NO']
 endif
 
 add_project_link_arguments(cpp.get_supported_link_arguments([
   '-Bsymbolic-functions'
-]), language : 'c')
+]), language: 'c')
 
 add_project_arguments(cpp.get_supported_arguments([
   '-fno-rtti',
   '-fno-exceptions',
   '-fno-threadsafe-statics',
   '-fvisibility-inlines-hidden', # maybe shouldn't be applied for mingw
-]), language : 'cpp')
+]), language: 'cpp')
 
 if host_machine.cpu_family() == 'arm' and cpp.alignment('struct { char c; }') != 1
   if cpp.has_argument('-mstructure-size-boundary=8')
-    add_project_arguments('-mstructure-size-boundary=8', language : 'cpp')
+    add_project_arguments('-mstructure-size-boundary=8', language: 'cpp')
   endif
 endif
 
@@ -256,16 +256,16 @@
 # CoreText (macOS) - FIXME: untested
 coretext_deps = []
 if host_machine.system() == 'darwin' and not get_option('coretext').disabled()
-  app_services_dep = dependency('appleframeworks', modules : ['ApplicationServices'], required: false)
+  app_services_dep = dependency('appleframeworks', modules: ['ApplicationServices'], required: false)
   if cpp.has_type('CTFontRef', prefix: '#include <ApplicationServices/ApplicationServices.h>', dependencies: app_services_dep)
     coretext_deps += [app_services_dep]
     conf.set('HAVE_CORETEXT', 1)
   # On iOS CoreText and CoreGraphics are stand-alone frameworks
   # Check for a different symbol to avoid getting cached result
   else
-    coretext_dep = dependency('appleframeworks', modules : ['CoreText'], required: false)
-    coregraphics_dep = dependency('appleframeworks', modules : ['CoreGraphics'], required: false)
-    corefoundation_dep = dependency('appleframeworks', modules : ['CoreFoundation'], required: false)
+    coretext_dep = dependency('appleframeworks', modules: ['CoreText'], required: false)
+    coregraphics_dep = dependency('appleframeworks', modules: ['CoreGraphics'], required: false)
+    corefoundation_dep = dependency('appleframeworks', modules: ['CoreFoundation'], required: false)
     if cpp.has_type('CTRunRef', prefix: '#include <CoreText/CoreText.h>', dependencies: [coretext_dep, coregraphics_dep, corefoundation_dep])
       coretext_deps += [coretext_dep, coregraphics_dep, corefoundation_dep]
       conf.set('HAVE_CORETEXT', 1)
diff --git a/meson_options.txt b/meson_options.txt
index e68a83f..b9102a8 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -21,12 +21,12 @@
   description: 'Enable CoreText shaper backend on macOS')
 
 # Common feature options
-option('tests', type : 'feature', value : 'enabled', yield : true,
+option('tests', type: 'feature', value: 'enabled', yield: true,
   description: 'Enable or disable unit tests')
-option('introspection', type : 'feature', value : 'auto', yield : true,
-  description : 'Generate gobject-introspection bindings (.gir/.typelib files)')
-option('gtk_doc',  type : 'feature', value : 'auto', yield : true,
-  description : 'Generate documentation with gtk-doc')
+option('introspection', type: 'feature', value: 'auto', yield: true,
+  description: 'Generate gobject-introspection bindings (.gir/.typelib files)')
+option('gtk_doc',  type: 'feature', value: 'auto', yield: true,
+  description: 'Generate documentation with gtk-doc')
 
 option('icu_builtin', type: 'boolean', value: false,
   description: 'Don\'t separate ICU support as harfbuzz-icu module')