Add fish_prompt

src/main.rs

@@ -13,7 +13,7 @@ use clap::{App, Arg};
 
 fn main() {
     let args = App::new("Starship")
-        .about("The cross-platform prompt for astronauts. ✨🚀")
+        .about("The cross-shell prompt for astronauts. ✨🚀")
         // pull the version number from Cargo.toml
         .version(crate_version!())
         // pull the authors from Cargo.toml

src/segment.rs

@@ -42,7 +42,7 @@ impl Segment {
     }
 
     /// Sets the style of the segment
-    /// 
+    ///
     /// Accepts either `Color` or `Style`.
     pub fn set_style<T>(&mut self, style: T) -> &mut Segment
     where