Return strip_quotes to prevent unnecessary folder creation

lib/src/metta/runner/environment.rs

@@ -471,6 +471,9 @@ fn include_path_from_cfg_atom(atom: &ExpressionAtom, env: &Environment) -> Resul
         None => return Err(format!("Error in environment.metta. #includePath missing path value"))
     };
     let path = <&crate::SymbolAtom>::try_from(path_atom)?.name();
+    // At this stage stdlib is not loaded and thus path is parsed as a symbol not string. 
+    // This is why we should manuall stip quotes from the symbol's name.
+    let path = crate::metta::runner::str::strip_quotes(path);
 
     //TODO-FUTURE: In the future we may want to replace dyn-fmt with strfmt, and do something a
     // little bit nicer than this

lib/src/metta/runner/str.rs

@@ -52,6 +52,22 @@ impl std::fmt::Display for Str {
     }
 }
 
+/// A utility function to return the part of a string in between starting and ending quotes
+pub fn strip_quotes(src: &str) -> &str {
+    if let Some(first) = src.chars().next() {
+        if first == '"' {
+            if let Some(last) = src.chars().last() {
+                if last == '"' {
+                    if src.len() > 1 {
+                        return &src[1..src.len()-1]
+                    }
+                }
+            }
+        }
+    }
+    src
+}
+
 #[derive(Default)]
 struct StrSerializer {
     value: Option<Str>,