Use registry.py 'alias' key instead of duplicate entries.

extensions/arbext.php

diff --git a/extensions/arbext.php b/extensions/arbext.php
index 2ecdd54..1fb61f9 100644
--- a/extensions/arbext.php
+++ b/extensions/arbext.php
@@ -407,8 +407,8 @@
 </li>
 <li value=190><a href="extensions/ARB/ARB_gl_spirv.txt">GL_ARB_gl_spirv</a>
 </li>
-<li value=191><a href="extensions/ARB/ARB_create_context_no_error.txt">WGL_ARB_create_context_no_error</a>
-</li>
 <li value=191><a href="extensions/ARB/ARB_create_context_no_error.txt">GLX_ARB_create_context_no_error</a>
+
+    <br> <a href="extensions/ARB/ARB_create_context_no_error.txt">WGL_ARB_create_context_no_error</a>
 </li>
 </ol>

extensions/registry.py

diff --git a/extensions/registry.py b/extensions/registry.py
index f2974dc..4c15136 100644
--- a/extensions/registry.py
+++ b/extensions/registry.py
@@ -547,6 +547,7 @@
         'flags' : { 'public' },
         'url' : 'extensions/ARB/ARB_create_context_no_error.txt',
         'comments' : 'Shares extension spec with WGL_ARB_create_context_no_error.',
+        'alias' : { 'WGL_ARB_create_context_no_error' },
     },
     'GLX_ARB_create_context_profile' : {
         'arbnumber' : 75,
@@ -2889,7 +2890,7 @@
         'flags' : { 'public' },
         'url' : 'extensions/NV/NV_EGL_stream_consumer_external.txt',
     },
-	'GL_NV_alpha_to_coverage_dither_control' : {
+        'GL_NV_alpha_to_coverage_dither_control' : {
         'number' : 500,
         'flags' : { 'public' },
         'url' : 'extensions/NV/NV_alpha_to_coverage_dither_control.txt',
@@ -4961,12 +4962,6 @@
         'url' : 'extensions/ARB/WGL_ARB_create_context.txt',
         'comments' : 'Alias to WGL_ARB_create_context_profile not needed - see arbnumber 74.',
     },
-    'WGL_ARB_create_context_no_error' : {
-        'arbnumber' : 191,
-        'flags' : { 'public' },
-        'url' : 'extensions/ARB/ARB_create_context_no_error.txt',
-        'comments' : 'Shares extension spec with GLX_ARB_create_context_no_error.',
-    },
     'WGL_ARB_create_context_profile' : {
         'arbnumber' : 74,
         'flags' : { 'public' },