Error format more like dart-sass.

Author: kaj

Diff for: src/error.rs

@@ -70,9 +70,10 @@ impl fmt::Display for Error {
                 let line_no = pos.line_no.to_string();
                 write!(
                     out,
-                    "{0:lnw$} ,\
+                    "{msg}\
+                     \n{0:lnw$} ,\
                      \n{ln} | {line}\
-                     \n{0:lnw$} |{0:>lpos$}^ {msg}\
+                     \n{0:lnw$} |{0:>lpos$}^\
                      \n{0:lnw$} '",
                     "",
                     line = pos.line,
@@ -90,7 +91,7 @@ impl fmt::Display for Error {
                         lnw = line_no.len(),
                         file = pos.file.name(),
                         row = pos.line_no,
-                        col = pos.line_pos - 1,
+                        col = pos.line_pos,
                         cause = if pos.file.imported_from().is_some() {
                             "import"
                         } else {