skip snippets in the main swift check

Author: QuietMisdreavus

Snippets/Parsing/test.md

@@ -1,3 +1,5 @@
 # Sample document
 
 This is a *sample document*.
+
+<!-- Copyright (c) 2022 Apple Inc and the Swift Project authors. All Rights Reserved. -->

Sources/Markdown/Markdown.docc/Snippets.md

@@ -41,3 +41,5 @@ a Markdown document to a consistent, preferred style.
 @Snippet(path: "swift-markdown/Snippets/Formatting/PreferredHeadingStyle")
 @Snippet(path: "swift-markdown/Snippets/Formatting/ThematicBreakCharacter")
 @Snippet(path: "swift-markdown/Snippets/Formatting/UseCodeFence")
+
+<!-- Copyright (c) 2022 Apple Inc and the Swift Project authors. All Rights Reserved. -->

bin/check-source

@@ -49,7 +49,7 @@ for language in swift-or-c bash md-or-tutorial html docker; do
   reader=head
   case "$language" in
       swift-or-c)
-        exceptions=( -name 'Package*.swift')
+        exceptions=( -name 'Package*.swift' -o -path './Snippets/*')
         matching_files=( -name '*.swift' -o -name '*.c' -o -name '*.h' )
         cat > "$tmp" <<"EOF"
 /*