simpler fix for eval whitespaces

vm/src/stdlib/builtins.rs

@@ -256,15 +256,6 @@ mod builtins {
                     ));
                 }
 
-                // Check for newlines, tabs, or whitespaces at start
-                let wsp_arr = [9, 10, 32];
-                let mut i = 0;
-                while i < source.len() && wsp_arr.contains(&source[i]) {
-                    i = i + 1;
-                }
-                // Slice off whitespaces
-                let source = &source[i..source.len()];
-
                 let source = std::str::from_utf8(source).map_err(|err| {
                     let msg = format!(
                         "(unicode error) 'utf-8' codec can't decode byte 0x{:x?} in position {}: invalid start byte",
@@ -274,7 +265,7 @@ mod builtins {
 
                     vm.new_exception_msg(vm.ctx.exceptions.syntax_error.to_owned(), msg)
                 })?;
-                Ok(Either::A(vm.ctx.new_str(source)))
+                Ok(Either::A(vm.ctx.new_str(source.trim_start())))
             }
             Either::B(code) => Ok(Either::B(code)),
         }?;