fix anchoring on same page API links (#194)

Author: CoreyKovalik

README.md

@@ -76,7 +76,7 @@ If you've come here to help contribute - Thanks! Take a look at the [contributin
     - [.toBeNegative()](#tobenegative)
     - [.toBeEven()](#tobeeven)
     - [.toBeOdd()](#tobeodd)
-    - [.toBeWithin(start, end)](#tobewithinstart--end)
+    - [.toBeWithin(start, end)](#tobewithinstart-end)
   - [Object](#object)
     - [.toBeObject()](#tobeobject)
     - [.toContainKey(key)](#tocontainkeykey)
@@ -87,10 +87,10 @@ If you've come here to help contribute - Thanks! Take a look at the [contributin
     - [.toContainValues([values])](#tocontainvaluesvalues)
     - [.toContainAllValues([values])](#tocontainallvaluesvalues)
     - [.toContainAnyValues([values])](#tocontainanyvaluesvalues)
-    - [.toContainEntry([key, value])](#tocontainentrykey--value)
-    - [.toContainEntries([[key, value]])](#tocontainentrieskey--value)
-    - [.toContainAllEntries([[key, value]])](#tocontainallentrieskey--value)
-    - [.toContainAnyEntries([[key, value]])](#tocontainanyentrieskey--value)
+    - [.toContainEntry([key, value])](#tocontainentrykey-value)
+    - [.toContainEntries([[key, value]])](#tocontainentrieskey-value)
+    - [.toContainAllEntries([[key, value]])](#tocontainallentrieskey-value)
+    - [.toContainAnyEntries([[key, value]])](#tocontainanyentrieskey-value)
     - [.toBeExtensible()](#tobeextensible)
     - [.toBeFrozen()](#tobefrozen)
     - [.toBeSealed()](#tobesealed)
@@ -104,7 +104,7 @@ If you've come here to help contribute - Thanks! Take a look at the [contributin
     - [.toStartWith(prefix)](#tostartwithprefix)
     - [.toEndWith(suffix)](#toendwithsuffix)
     - [.toInclude(substring)](#toincludesubstring)
-    - [.toIncludeRepeated(substring, times)](#toincluderepeatedsubstring--times)
+    - [.toIncludeRepeated(substring, times)](#toincluderepeatedsubstring-times)
     - [.toIncludeMultiple([substring])](#toincludemultiplesubstring)
 - [LICENSE](#license)