Fix some spelling and formatting

Author: facelessuser

docs/src/dictionary/en-custom.txt

@@ -79,6 +79,7 @@ Octicons
 PHP
 PNG
 PNGs
+PRs
 Pandoc
 Parsers
 PathConverter
@@ -96,6 +97,7 @@ Pymdownx
 Reindent
 Rosaceae
 SCSS
+SSRF
 SVG
 SVGs
 SaneHeaders
@@ -187,6 +189,7 @@ kbd
 keymap
 linkafies
 linter
+localhost
 lowercased
 lowercases
 macOS
@@ -271,6 +274,7 @@ unicode
 unindented
 unittest
 unstyled
+untrusted
 uslugify
 validator
 validators

docs/src/markdown/extensions/snippets.md

@@ -310,7 +310,7 @@ When Snippets processes a directive as shown below, it will attempt to include t
 output.
 
 ```text
----8<--- "some-target"
+;--8<-- "some-target"
 ```
 
 If **URL Snippets** are enabled via `url_download`, the renderer may download content from arbitrary URLs. In unsafe
@@ -323,7 +323,7 @@ If an attacker can influence Markdown content and `url_download` is enabled, the
 as:
 
 ```text
----8<--- "http://127.0.0.1:9999/"
+;--8<-- "http://127.0.0.1:9999/"
 ```
 
 ### Safe Usage Guidance