Docs: Fix code-blocks in spaced-comment docs

The space-comment docs page had indented code blocks with the JSON type. Because
of that they weren't converted to HTML correctly, leaving `json` in plain text
on the page.

docs/rules/spaced-comment.md

@@ -26,17 +26,17 @@ The rule takes two options.
     * The `"exceptions"` value is an array of string patterns which are considered exceptions to the rule.
     Please note that exceptions are ignored if the first argument is `"never"`.
 
-    ```json
-    "spaced-comment": ["error", "always", { "exceptions": ["-", "+"] }]
-    ```
+```json
+"spaced-comment": ["error", "always", { "exceptions": ["-", "+"] }]
+```
 
     * The `"markers"` value is an array of string patterns which are considered markers for docblock-style comments,
     such as an additional `/`, used to denote documentation read by doxygen, vsdoc, etc. which must have additional characters.
     The `"markers"` array will apply regardless of the value of the first argument, e.g. `"always"` or `"never"`.
 
-    ```json
-    "spaced-comment": ["error", "always", { "markers": ["/"] }]
-    ```
+```json
+"spaced-comment": ["error", "always", { "markers": ["/"] }]
+```
 
 The difference between a marker and an exception is that a marker only appears at the beginning of the comment whereas
 exceptions can occur anywhere in the comment string.