Merge #307: fix: fixes tests on windows

c10f5a6 fix: fixes tests on windows (stringhandler)

Pull request description:

  `cargo test` is currently broken on Windows. This should fix it.

ACKs for top commit:
  delta1:
    ACK c10f5a6; tested locally on linux

Tree-SHA512: c6d75fdf45c8d829415b965a3aacc58acddc6dda9cbee94b1241cab464a12a4b4c449d4769d06b57628a078a1463a2cdfc16cb88d36ff5c3dcd83b16b34c7f96

Author: delta1

src/main.rs

@@ -148,7 +148,8 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
             std::process::exit(1);
         });
 
-        let (context_path, alias) = if let Some((ctx_str, alias_str)) = left_side.split_once(':') {
+        // Use the right most `:` because on Windows, there might be a drive letter, e.g. C:\
+        let (context_path, alias) = if let Some((ctx_str, alias_str)) = left_side.rsplit_once(':') {
             // Specific context provided (e.g., merkle:base_math=...)
             // We convert it to PathBuf so it shares the same type as main_path
             let canon_path = CanonPath::canonicalize(Path::new(ctx_str))?;