stringUtils.ts: convert backwards to forward slashes on non-Windows platforms

\\ as path separator is Windows-specific. Keep them unmodified there, otherwise normalize to forward slashes.

Signed-off-by: Francesco Giancane <me@fgiancane8.dev>

Author: fgiancane8

src/extension/common/stringUtils.ts

@@ -58,5 +58,8 @@ export function fileToCommandArgumentForPythonExt(source: string): string {
     if (!source) {
         return source;
     }
-    return toCommandArgumentForPythonExt(source).replace(/\\/g, '/');
+
+    let result = toCommandArgumentForPythonExt(source);
+
+    return result;
 }