Add RunCMake.Syntax test cases for command invocation styles

Cover commands with whitespace present in allowed combinations.
Also cover command error cases such as two on one line.

Tests/RunCMake/Syntax/.gitattributes

@@ -0,0 +1 @@
+CommandTabs.cmake   whitespace=-tab-in-indent

Tests/RunCMake/Syntax/CommandComments-stderr.txt

@@ -0,0 +1,4 @@
+Example Message
+Example Message
+Example Message
+Second Line of Example

Tests/RunCMake/Syntax/CommandComments.cmake

@@ -0,0 +1,6 @@
+message("Example Message"#)
+        )
+message ("Example Message" # )
+        )
+message( "Example Message\n" # "Commented" )
+         "Second Line of Example")

Tests/RunCMake/Syntax/CommandError0-result.txt

@@ -0,0 +1 @@
+1

Tests/RunCMake/Syntax/CommandError0-stderr.txt

@@ -0,0 +1,8 @@
+CMake Error: Error in cmake code at
+.*/Tests/RunCMake/Syntax/CommandError0.cmake:2:
+Parse error.  Expected "\(", got newline with text "
+".
+CMake Error at CMakeLists.txt:3 \(include\):
+  include could not find load file:
+
+    CommandError0.cmake

Tests/RunCMake/Syntax/CommandError0.cmake

@@ -0,0 +1,2 @@
+message
+  ("Example Message")

Tests/RunCMake/Syntax/CommandError1-result.txt

@@ -0,0 +1 @@
+1

Tests/RunCMake/Syntax/CommandError1-stderr.txt

@@ -0,0 +1,7 @@
+CMake Error: Error in cmake code at
+.*/Tests/RunCMake/Syntax/CommandError1.cmake:1:
+Parse error.  Expected a newline, got identifier with text "message".
+CMake Error at CMakeLists.txt:3 \(include\):
+  include could not find load file:
+
+    CommandError1.cmake

Tests/RunCMake/Syntax/CommandError1.cmake

@@ -0,0 +1 @@
+message("Example Message") message("Second Message")

Tests/RunCMake/Syntax/CommandNewlines-stderr.txt

@@ -0,0 +1,3 @@
+Example Message
+Example Message
+Example Message

Tests/RunCMake/Syntax/CommandNewlines.cmake

@@ -0,0 +1,10 @@
+message(
+  "Example Message")
+message (
+  "Example Message"
+  )
+message(
+
+  "Example Message"
+
+  )

Tests/RunCMake/Syntax/CommandSpaces-stderr.txt

@@ -0,0 +1,6 @@
+Example Message
+Example Message
+Example Message
+Example Message
+Example Message
+Example Message

Tests/RunCMake/Syntax/CommandSpaces.cmake

@@ -0,0 +1,6 @@
+message("Example Message")
+message ("Example Message")
+message( "Example Message" )
+message( "Example Message")
+  message  ( "Example Message")
+message ( Example " " Message )

Tests/RunCMake/Syntax/CommandTabs-stderr.txt

@@ -0,0 +1,6 @@
+Example Message
+Example Message
+Example Message
+Example Message
+Example Message
+Example Message

Tests/RunCMake/Syntax/CommandTabs.cmake

@@ -0,0 +1,6 @@
+message("Example Message")
+message	("Example Message")
+message(	"Example Message"	)
+message(	"Example Message")
+	message (	"Example Message")
+message	(	Example	" "	Message	)

Tests/RunCMake/Syntax/RunCMakeTest.cmake

@@ -1,5 +1,11 @@
 include(RunCMake)
 
+run_cmake(CommandSpaces)
+run_cmake(CommandTabs)
+run_cmake(CommandNewlines)
+run_cmake(CommandComments)
+run_cmake(CommandError0)
+run_cmake(CommandError1)
 run_cmake(String0)
 run_cmake(String1)
 run_cmake(StringNoSpace)