Fix ParseError in SX Manifesto: bare backslash + unclosed li

- Wrap \"this\" in sx string quotes so backslash escapes are inside a string
- Remove stray quote before closing paren on wire protocol li item

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

sx/sxc/pages/__init__.py

@@ -2535,7 +2535,7 @@ def _essay_sx_manifesto() -> str:
         'Like every revolutionary who becomes a tyrant, '
         'it kept the worst habits of the regime it overthrew: '
         'weak typing, prototype chains, and the "'
-        f'  {em} \\"this\\")'
+        f'  {em} "\\"this\\"")'
         '      " keyword.")'
         f'    {p}'
         '      "CSS, the third estate, controls all visual presentation '
@@ -2751,7 +2751,7 @@ def _essay_sx_manifesto() -> str:
         '      (li "Abolition of the language distinction between structure, style, and behaviour")'
         '      (li "Equal obligation of all expressions to be data as well as code")'
         f'      (li "Gradual abolition of the distinction between server and client '
-        f'by means of a uniform " {i("/protocols/wire-format", "wire protocol")} ")'
+        f'by means of a uniform " {i("/protocols/wire-format", "wire protocol")})'
         '      (li "Free evaluation for all expressions in public and private environments")'
         '      (li "Abolition of the node_modules directory "  '
         '        (span :class "text-stone-400 italic" "(this alone justifies the revolution)")))'