Make map-syntax target case insensitive

src/assets.rs

@@ -163,7 +163,7 @@ impl HighlightingAssets {
 
         if let Some(MappingTarget::MapTo(syntax_name)) = syntax_match {
             return self
-                .find_syntax_by_name(syntax_name)?
+                .find_syntax_by_token(syntax_name)?
                 .ok_or_else(|| Error::UnknownSyntax(syntax_name.to_owned()));
         }
 
@@ -259,6 +259,13 @@ impl HighlightingAssets {
             .map(|syntax| SyntaxReferenceInSet { syntax, syntax_set }))
     }
 
+    fn find_syntax_by_token(&self, token: &str) -> Result<Option<SyntaxReferenceInSet>> {
+        let syntax_set = self.get_syntax_set()?;
+        Ok(syntax_set
+            .find_syntax_by_token(token)
+            .map(|syntax| SyntaxReferenceInSet { syntax, syntax_set }))
+    }
+
     fn get_syntax_for_file_name(
         &self,
         file_name: &OsStr,