README tweaks.

README.md

@@ -30,9 +30,9 @@ Iron has been built and tested with the following dependencies
   specific to this logic that are used later.
 
 - The machinery for connecting the generalized proofmode/MoSeL from to
-  fractional predicates is contained in (theories/proofmode)[theories/proofmode].
+  fractional predicates is contained in [theories/proofmode](theories/proofmode).
 
-- In (theories/iron_logic)[theories/iron_logic] much of the core Iron logic
+- In [theories/iron_logic](theories/iron_logic) much of the core Iron logic
   discussed in Section 2 is defined.
   * _Uniformity_ with respect to fractions is defined in
     [theories/iron_logic/iron.v](theories/iron_logic/iron.v) as `Uniform` and
@@ -48,7 +48,7 @@ Iron has been built and tested with the following dependencies
     [theories/heap_lang/heap.v](theories/heap_lang/heap.v) as `heapG`. So too
     are the definitions of ↦ and 𝖊 (in the formalization called `perm`).
   * The theorems stated in Section 5 about updates to the heap ghost
-    state are proven in (theories/heap_lang/heap.v)[theories/heap_lang/heap.v].
+    state are proven in [theories/heap_lang/heap.v](theories/heap_lang/heap.v).
   * The state interpretation from Section 5 is defined in
     [theories/heap_lang/heap.v](theories/heap_lang/heap.v) as `heap_ctx`.
   * Theorems 2.1, 2.2, 4.1, and 4.2 are proven in