config_paths: fix comment

src/env/config_paths.rs

@@ -32,7 +32,7 @@
         );
         // TODO: we should determine program_name from argv0 somewhere in this file
 
-        // Detect if we're running right out of the CMAKE build directory
+        // If we're in Cargo's target directory or CMake's build directory, use the source files.
         if exec_path.starts_with(env!("FISH_BUILD_DIR")) {
             let workspace_root = workspace_root();
             FLOG!(