Added non-interactive mode for --list-languages

This makes scripting it a lot easier and less hacky.

src/main.rs

@@ -108,6 +108,14 @@ pub fn list_languages(config: &Config) -> Result<()> {
         .collect::<Vec<_>>();
     languages.sort_by_key(|lang| lang.name.to_uppercase());
 
+    let stdout = io::stdout();
+    let mut stdout = stdout.lock();
+
+    if config.loop_through {
+        for lang in languages {
+            write!(stdout, "{}:{}\n", lang.name, lang.file_extensions.join(","));
+        }
+    } else {
         let longest = languages
             .iter()
             .map(|syntax| syntax.name.len())
@@ -119,9 +127,6 @@ pub fn list_languages(config: &Config) -> Result<()> {
         // Line-wrapping for the possible file extension overflow.
         let desired_width = config.term_width - longest - separator.len();
 
-    let stdout = io::stdout();
-    let mut stdout = stdout.lock();
-
         let style = if config.colored_output {
             Green.normal()
         } else {
@@ -151,6 +156,7 @@ pub fn list_languages(config: &Config) -> Result<()> {
             }
             writeln!(stdout)?;
         }
+    }
 
     Ok(())
 }