make CMake script formatting more consistent

cmake/CMakeLists.txt

@@ -25,7 +25,7 @@ set(LAMMPS_POTENTIALS_DIR ${LAMMPS_DIR}/potentials)
 find_package(Git)
 
 # by default, install into $HOME/.local (not /usr/local), so that no root access (and sudo!!) is needed
-if (CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
+if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
   set(CMAKE_INSTALL_PREFIX "$ENV{HOME}/.local" CACHE PATH "default install path" FORCE )
 endif()
 
@@ -33,7 +33,7 @@ endif()
 set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/Modules)
 
 # make sure LIBRARY_PATH is set if environment variable is set
-if (DEFINED ENV{LIBRARY_PATH})
+if(DEFINED ENV{LIBRARY_PATH})
   list(APPEND CMAKE_LIBRARY_PATH "$ENV{LIBRARY_PATH}")
   message(STATUS "Appending $ENV{LIBRARY_PATH} to CMAKE_LIBRARY_PATH: ${CMAKE_LIBRARY_PATH}")
 endif()
@@ -580,7 +580,7 @@ add_dependencies(lammps gitversion)
 ############################################
 get_property(LANGUAGES GLOBAL PROPERTY ENABLED_LANGUAGES)
 list (FIND LANGUAGES "Fortran" _index)
-if (${_index} GREATER -1)
+if(${_index} GREATER -1)
   target_link_libraries(lammps PRIVATE ${CMAKE_Fortran_IMPLICIT_LINK_LIBRARIES})
 endif()
 set(LAMMPS_CXX_HEADERS angle.h atom.h bond.h citeme.h comm.h compute.h dihedral.h domain.h error.h fix.h force.h group.h improper.h
@@ -737,14 +737,14 @@ if(OPTIONS)
 endif()
 get_property(LANGUAGES GLOBAL PROPERTY ENABLED_LANGUAGES)
 list (FIND LANGUAGES "Fortran" _index)
-if (${_index} GREATER -1)
+if(${_index} GREATER -1)
   message(STATUS "Fortran Compiler: ${CMAKE_Fortran_COMPILER}
       Type:          ${CMAKE_Fortran_COMPILER_ID}
       Version:       ${CMAKE_Fortran_COMPILER_VERSION}
       Fortran Flags:${CMAKE_Fortran_FLAGS} ${CMAKE_Fortran_FLAGS_${BTYPE}}")
 endif()
 list (FIND LANGUAGES "C" _index)
-if (${_index} GREATER -1)
+if(${_index} GREATER -1)
   message(STATUS "C compiler:       ${CMAKE_C_COMPILER}
       Type:          ${CMAKE_C_COMPILER_ID}
       Version:       ${CMAKE_C_COMPILER_VERSION}

cmake/Modules/CodingStandard.cmake

@@ -8,7 +8,7 @@ else()
     find_package(Python3 COMPONENTS Interpreter QUIET)
 endif()
 
-if (Python3_EXECUTABLE)
+if(Python3_EXECUTABLE)
     if(Python3_VERSION VERSION_GREATER_EQUAL 3.5)
         add_custom_target(
           check-whitespace

cmake/Modules/MPI4WIN.cmake

@@ -1,7 +1,7 @@
 # Download and configure custom MPICH files for Windows
 message(STATUS "Downloading and configuring MPICH-1.4.1 for Windows")
 include(ExternalProject)
-if (CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64")
+if(CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64")
   ExternalProject_Add(mpi4win_build
     URL https://download.lammps.org/thirdparty/mpich2-win64-devel.tar.gz
     URL_MD5 4939fdb59d13182fd5dd65211e469f14

unittest/c-library/CMakeLists.txt

@@ -56,7 +56,7 @@ target_link_libraries(test_library_config PRIVATE lammps GTest::GTest GTest::GMo
 target_compile_definitions(test_library_config PRIVATE ${TEST_CONFIG_DEFS})
 add_test(LibraryConfig test_library_config)
 
-if (BUILD_MPI)
+if(BUILD_MPI)
   add_executable(test_library_mpi test_library_mpi.cpp)
   target_link_libraries(test_library_mpi PRIVATE lammps GTest::GTest GTest::GMock)
   target_compile_definitions(test_library_mpi PRIVATE ${TEST_CONFIG_DEFS})

unittest/formats/CMakeLists.txt

@@ -17,7 +17,7 @@ target_link_libraries(test_potential_file_reader PRIVATE lammps GTest::GMock GTe
 add_test(NAME PotentialFileReader COMMAND test_potential_file_reader WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
 set_tests_properties(PotentialFileReader PROPERTIES ENVIRONMENT "LAMMPS_POTENTIALS=${LAMMPS_POTENTIALS_DIR}")
 
-if (PKG_MANYBODY)
+if(PKG_MANYBODY)
     add_executable(test_eim_potential_file_reader test_eim_potential_file_reader.cpp)
     target_link_libraries(test_eim_potential_file_reader PRIVATE lammps GTest::GMock GTest::GTest)
     add_test(NAME EIMPotentialFileReader COMMAND test_eim_potential_file_reader WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
@@ -33,7 +33,7 @@ target_link_libraries(test_dump_atom PRIVATE lammps GTest::GMock GTest::GTest)
 add_test(NAME DumpAtom COMMAND test_dump_atom WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
 set_tests_properties(DumpAtom PROPERTIES ENVIRONMENT "LAMMPS_POTENTIALS=${LAMMPS_POTENTIALS_DIR}")
 
-if (PKG_COMPRESS)
+if(PKG_COMPRESS)
     find_program(GZIP_BINARY NAMES gzip REQUIRED)
 
     add_executable(test_dump_atom_gz test_dump_atom_gz.cpp)
@@ -113,7 +113,7 @@ target_link_libraries(test_dump_cfg PRIVATE lammps GTest::GMock GTest::GTest)
 add_test(NAME DumpCfg COMMAND test_dump_cfg WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
 set_tests_properties(DumpCfg PROPERTIES ENVIRONMENT "LAMMPS_POTENTIALS=${LAMMPS_POTENTIALS_DIR}")
 
-if (BUILD_TOOLS)
+if(BUILD_TOOLS)
     set_tests_properties(DumpAtom PROPERTIES ENVIRONMENT "BINARY2TXT_BINARY=$<TARGET_FILE:binary2txt>")
     set_tests_properties(DumpCustom PROPERTIES ENVIRONMENT "BINARY2TXT_BINARY=$<TARGET_FILE:binary2txt>")
 endif()

unittest/python/CMakeLists.txt

@@ -25,7 +25,7 @@ else()
   find_package(Python3 COMPONENTS Interpreter)
 endif()
 
-if (Python_EXECUTABLE)
+if(Python_EXECUTABLE)
   # prepare to augment the environment so that the LAMMPS python module and the shared library is found.
   set(PYTHON_TEST_ENVIRONMENT PYTHONPATH=${LAMMPS_PYTHON_DIR}:$ENV{PYTHONPATH})
   if(APPLE)