Fix some formatting issues, mostly around comments and whitespace.

src/compiler.rs

@@ -10,7 +10,7 @@ use pretty::termcolor::{ColorChoice, StandardStream};
 use target_lexicon::Triple;
 
 /// A high-level compiler for NGR programs.
-/// 
+///
 /// This object can be built once, and then re-used many times to build multiple
 /// files. For most users, the [`Default`] implementation should be sufficient;
 /// it will use `stderr` for warnings and errors, with default colors based on
@@ -62,17 +62,17 @@ impl Compiler {
 
     /// This is the actual meat of the compilation chain; we hide it from the user
     /// because the type is kind of unpleasant.
-    /// 
+    ///
     /// The weird error type comes from the fact that we can run into three types
     /// of result:
-    /// 
+    ///
     ///    * Fundamental errors, like an incorrectly formatted file or some
     ///      oddity with IO. These return `Err`.
     ///    * Validation errors, where we reject the program due to something
     ///      semantically wrong with them. These return `Ok(None)`.
     ///    * Success! In this case, we return `Ok(Some(...))`, where the bytes
     ///      returned is the contents of the compiled object file.
-    /// 
+    ///
     fn compile_internal(&mut self, input_file: &str) -> Result<Option<Vec<u8>>, CompilerError> {
         // Try to parse the file into our syntax AST. If we fail, emit the error
         // and then immediately return `None`.
@@ -111,7 +111,7 @@ impl Compiler {
     }
 
     /// Emit a diagnostic.
-    /// 
+    ///
     /// This is just a really handy shorthand we use elsewhere in the object, because
     /// there's a lot of boilerplate we'd like to skip.
     fn emit(&mut self, diagnostic: Diagnostic<usize>) {