fix：去除current_head()返回值中的\n

\n会导致文件写入失败

src/commands/commit.rs

@@ -3,13 +3,13 @@ use crate::models::{commit, index};
 
 use super::status;
 
-fn no_change() -> bool {
+fn no_change() -> bool { //todo: move to status.rs
     let change = status::changes_to_be_committed();
     change.new.len() == 0 && change.modified.len() == 0 && change.deleted.len() == 0
 }
-pub fn commit(message: String, allow_enpty: bool) {
+pub fn commit(message: String, allow_empty: bool) {
     let index = index::Index::new();
-    if no_change() && !allow_enpty {
+    if no_change() && !allow_empty {
         panic!("工作区没有任何改动，不需要提交");
     }