Fix syntax highlighting for go files

scm-ui/ui-components/src/repos/TokenizedDiffView.tsx

@@ -26,6 +26,7 @@ import styled from "styled-components";
 // @ts-ignore we have no typings for react-diff-view
 import { Diff, useTokenizeWorker } from "react-diff-view";
 import { File } from "./DiffTypes";
+import { determineLanguage } from "../languages";
 
 // styling for the diff tokens
 // this must be aligned with th style, which is used in the SyntaxHighlighter component
@@ -86,17 +87,10 @@ type Props = {
   className?: string;
 };
 
-const determineLanguage = (file: File) => {
-  if (file.language) {
-    return file.language.toLowerCase();
-  }
-  return "text";
-};
-
 const TokenizedDiffView: FC<Props> = ({ file, viewType, className, children }) => {
   const { tokens } = useTokenizeWorker(tokenize, {
     hunks: file.hunks,
-    language: determineLanguage(file)
+    language: determineLanguage(file.language)
   });
 
   return (

scm-ui/ui-components/src/repos/annotate/Annotate.stories.tsx

@@ -67,7 +67,7 @@ const commitImplementMain = {
 };
 
 const source: AnnotatedSource = {
-  language: "go",
+  language: "golang",
   lines: [
     {
       lineNumber: 1,

scm-ui/ui-components/src/repos/annotate/Annotate.tsx

@@ -35,6 +35,7 @@ import { DateInput } from "../../useDateFormatter";
 import Popover from "./Popover";
 import AnnotateLine from "./AnnotateLine";
 import { Action } from "./actions";
+import { determineLanguage } from "../../languages";
 
 type Props = {
   source: AnnotatedSource;
@@ -147,7 +148,7 @@ const Annotate: FC<Props> = ({ source, repository, baseDate }) => {
       {popover}
       <ReactSyntaxHighlighter
         showLineNumbers={false}
-        language={source.language ? source.language : "text"}
+        language={determineLanguage(source.language)}
         style={highlightingTheme}
         renderer={defaultRenderer}
       >