STYLE: Remove CMake-language block-end command arguments

Ancient versions of CMake required else(), endif(), and similar block
termination commands to have arguments matching the command starting the block.
This is no longer the preferred style.

doc/CMakeLists.txt

@@ -7,8 +7,8 @@ project(EigenDoc)
 if(CMAKE_COMPILER_IS_GNUCXX)
   if(CMAKE_SYSTEM_NAME MATCHES Linux)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O1 -g1")
-  endif(CMAKE_SYSTEM_NAME MATCHES Linux)
-endif(CMAKE_COMPILER_IS_GNUCXX)
+  endif()
+endif()
 
 # some examples and snippets needs c++11, so let's check it once
 check_cxx_compiler_flag("-std=c++11" EIGEN_COMPILER_SUPPORT_CPP11)
@@ -24,9 +24,9 @@ set(EIGEN_DOXY_HTML_COLORSTYLE_HUE      "220")
 set(EIGEN_DOXY_TAGFILES                 "")
 if(EIGEN_INTERNAL_DOCUMENTATION)
   set(EIGEN_DOXY_INTERNAL                 "YES")
-else(EIGEN_INTERNAL_DOCUMENTATION)
+else()
   set(EIGEN_DOXY_INTERNAL                 "NO")
-endif(EIGEN_INTERNAL_DOCUMENTATION)
+endif()
 
 configure_file(
   ${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in

doc/examples/CMakeLists.txt

@@ -13,7 +13,7 @@ foreach(example_src ${examples_SRCS})
     ARGS >${CMAKE_CURRENT_BINARY_DIR}/${example}.out
   )
   add_dependencies(all_examples ${example})
-endforeach(example_src)
+endforeach()
 
 if(EIGEN_COMPILER_SUPPORT_CPP11)
 ei_add_target_property(nullary_indexing COMPILE_FLAGS "-std=c++11")

doc/snippets/CMakeLists.txt

@@ -33,4 +33,4 @@ foreach(snippet_src ${snippets_SRCS})
   else()
     message("skip snippet ${snippet_src} because compiler does not support C++11")
   endif()
-endforeach(snippet_src)
+endforeach()

doc/special_examples/CMakeLists.txt

@@ -3,7 +3,7 @@ if(NOT EIGEN_TEST_NOQT)
   if(QT4_FOUND)
     include(${QT_USE_FILE})
   endif()
-endif(NOT EIGEN_TEST_NOQT)
+endif()
 
 if(QT4_FOUND)
   add_executable(Tutorial_sparse_example Tutorial_sparse_example.cpp Tutorial_sparse_example_details.cpp)
@@ -17,7 +17,7 @@ if(QT4_FOUND)
   )
 
   add_dependencies(all_examples Tutorial_sparse_example)
-endif(QT4_FOUND)
+endif()
 
 if(EIGEN_COMPILER_SUPPORT_CPP11)
   add_executable(random_cpp11 random_cpp11.cpp)