Fix typos and markdown (#36)

src/algorithms/myers.rs

@@ -12,7 +12,7 @@
 //! # Heuristics
 //!
 //! At present this implementation of Myers' does not implement any more advanced
-//! heuristics that would solve some pathological cases.  For instane passing two
+//! heuristics that would solve some pathological cases.  For instance passing two
 //! large and completely distinct sequences to the algorithm will make it spin
 //! without making reasonable progress.  Currently the only protection in the
 //! library against this is to pass a deadline to the diffing algorithm.

src/algorithms/utils.rs

@@ -11,7 +11,7 @@ pub fn is_empty_range<T: PartialOrd<T>>(range: &Range<T>) -> bool {
     !(range.start < range.end)
 }
 
-/// Represents an item in the vector returend by [`unique`].
+/// Represents an item in the vector returned by [`unique`].
 ///
 /// It compares like the underlying item does it was created from but
 /// carries the index it was originally created from.

src/text/mod.rs

@@ -56,7 +56,7 @@ impl TextDiffConfig {
     /// Sets a deadline for the diff operation.
     ///
     /// By default a diff will take as long as it takes.  For certain diff
-    /// algorthms like Myer's and Patience a maximum running time can be
+    /// algorithms like Myer's and Patience a maximum running time can be
     /// defined after which the algorithm gives up and approximates.
     pub fn deadline(&mut self, deadline: Instant) -> &mut Self {
         self.deadline = Some(Deadline::Absolute(deadline));