Improve habit writing to files.

src/habitmgr.rs

@@ -18,7 +18,7 @@
 
 use std::path::PathBuf;
 use std::fs::{File, OpenOptions};
-use std::io::{BufReader, BufRead};
+use std::io::{BufReader, BufRead, Write};
 
 use crate::habit::Habit;
 
@@ -69,8 +69,8 @@ impl HabitMgr
 
 	pub fn add(&mut self, name:String, bad:bool, weight:u8, _days:String)
 	{
-		let habits_file = OpenOptions::new()
-			.write(true)
+		// TODO: Refractor so perhaps we import habits first and then export them
+		let mut habits_file = OpenOptions::new()
 			.append(true)
 			.open(&self.habits_path)
 			.unwrap_or_else(|e| {
@@ -78,7 +78,9 @@ impl HabitMgr
 			});
 
 		let habit = Habit::new(name.clone(), bad, weight);
-		serde_json::to_writer(habits_file, &habit)
+		let mut habit_string = serde_json::to_string(&habit).unwrap();
+		habit_string.push_str("\n");
+		habits_file.write_all(habit_string.as_bytes())
 			.unwrap_or_else(|e| {
 				panic!("Error writing to file {}:\n{}",
 							 self.habits_path.display(), e);