DATAKV-323 - Fix typo in the reference documentation.

Original pull request: #51.

Author: rdupret

src/main/asciidoc/key-value-repositories.adoc

@@ -46,7 +46,7 @@ In its very basic shape, the `KeyValueTemplate` uses a `MapAdapter` that wraps a
 
 NOTE: The used `KeyValueAdapter` does the heavy lifting when it comes to storing and retrieving data. The data structure influences performance and multi-threading behavior.
 
-You can use a different type or preinitialize the adapter with some values, and you can do so byusing various constructors on `MapKeyValueAdapter`, as the following example shows:
+You can use a different type or preinitialize the adapter with some values, and you can do so by using various constructors on `MapKeyValueAdapter`, as the following example shows:
 
 [source, java]
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