Minor error formatting fixes.

Signed-off-by: Colm Donelan <colm.donelan@arm.com>
Change-Id: I17823fb8b6bbabc4da327187167ce9582ee29b32
diff --git a/delegate/src/armnn_delegate.cpp b/delegate/src/armnn_delegate.cpp
index 4e99335..b2ad160 100644
--- a/delegate/src/armnn_delegate.cpp
+++ b/delegate/src/armnn_delegate.cpp
@@ -428,7 +428,7 @@
         if (loadingStatus != armnn::Status::Success)
         {
             // Network load failed.
-            throw armnn::Exception("TfLiteArmnnDelegate: Network could not be loaded:" + errorMessage);
+            throw armnn::Exception("TfLiteArmnnDelegate: Network could not be loaded: " + errorMessage);
         }
 
         ARMNN_LOG(info) << "Load ArmnnSubgraph time: " << std::setprecision(2)
diff --git a/src/backends/cl/ClImportTensorHandle.hpp b/src/backends/cl/ClImportTensorHandle.hpp
index aba12d0..889a2ad 100644
--- a/src/backends/cl/ClImportTensorHandle.hpp
+++ b/src/backends/cl/ClImportTensorHandle.hpp
@@ -231,7 +231,7 @@
 
         if (error != CL_SUCCESS)
         {
-            throw MemoryImportException("ClImportTensorHandle::Invalid imported memory" + std::to_string(error));
+            throw MemoryImportException("ClImportTensorHandle::Invalid imported memory: " + std::to_string(error));
         }
 
         cl::Buffer wrappedBuffer(buffer);
diff --git a/tests/ImageTensorGenerator/ImageTensorGenerator.cpp b/tests/ImageTensorGenerator/ImageTensorGenerator.cpp
index 0f1cf6d..d4a2103 100644
--- a/tests/ImageTensorGenerator/ImageTensorGenerator.cpp
+++ b/tests/ImageTensorGenerator/ImageTensorGenerator.cpp
@@ -264,7 +264,7 @@
         }
         else
         {
-            throw armnn::Exception("Unsupported input type" + m_OutputType);
+            throw armnn::Exception("Unsupported input type " + m_OutputType);
         }
     }