Fix some markdown issues.

Work around some cases where the old markdown parser differs from the
new Pulldown parser for the documentation.

lib/cretonne/src/ir/dfg.rs

@@ -705,7 +705,7 @@ impl DataFlowGraph {
     /// Returns the position of `val` before removal.
     ///
     /// *Important*: to ensure O(1) deletion, this method swaps the removed parameter with the
-    /// last `ebb`` parameter. This can disrupt all the branch instructions jumping to this
+    /// last `ebb` parameter. This can disrupt all the branch instructions jumping to this
     /// `ebb` for which you have to change the branch argument order if necessary.
     ///
     /// Panics if `val` is not an EBB parameter.

lib/cretonne/src/ir/immediates.rs

@@ -526,7 +526,7 @@ impl Ieee32 {
         Ieee32(x)
     }
 
-    /// Create an `Ieee32` number representing 2.0^n.
+    /// Create an `Ieee32` number representing `2.0^n`.
     pub fn pow2<I: Into<i32>>(n: I) -> Ieee32 {
         let n = n.into();
         let w = 8;
@@ -578,7 +578,7 @@ impl Ieee64 {
         Ieee64(x)
     }
 
-    /// Create an `Ieee64` number representing 2.0^n.
+    /// Create an `Ieee64` number representing `2.0^n`.
     pub fn pow2<I: Into<i64>>(n: I) -> Ieee64 {
         let n = n.into();
         let w = 11;

lib/cretonne/src/ir/types.rs

@@ -265,8 +265,9 @@ impl Type {
     }
 
     /// True iff:
-    ///     1) self.lane_count() == other.lane_count() and
-    ///     2) self.lane_bits() >= other.lane_bits()
+    ///
+    /// 1. `self.lane_count() == other.lane_count()` and
+    /// 2. `self.lane_bits() >= other.lane_bits()`
     pub fn wider_or_equal(self, other: Type) -> bool {
         self.lane_count() == other.lane_count() && self.lane_bits() >= other.lane_bits()
     }