cmDocumentationEntry: Drop all user provided ctors for C++ >= 14

There is no need for them cuz:

- the last field has a default value
- all static instances use 2 arguments convertible to `std::string`
- "dynamic" instances used for _Generator_ doc entries access
  fields diectly using default constructed instance

Moreover, compiler may generate move ctor/assign when needed.

1 files changed, 6 insertions, 4 deletions

diff --git a/Source/cmakemain.cxx b/Source/cmakemain.cxx
index 1ca3e55..a155787 100644
--- a/Source/cmakemain.cxx
+++ b/Source/cmakemain.cxx
@@ -47,22 +47,24 @@
 namespace {
 #ifndef CMAKE_BOOTSTRAP
 const cmDocumentationEntry cmDocumentationName = {
-  nullptr, "  cmake - Cross-Platform Makefile Generator."
+  {},
+  "  cmake - Cross-Platform Makefile Generator."
 };
 
 const cmDocumentationEntry cmDocumentationUsage[2] = {
-  { nullptr,
+  { {},
     "  cmake [options] <path-to-source>\n"
     "  cmake [options] <path-to-existing-build>\n"
     "  cmake [options] -S <path-to-source> -B <path-to-build>" },
-  { nullptr,
+  { {},
     "Specify a source directory to (re-)generate a build system for "
     "it in the current working directory.  Specify an existing build "
     "directory to re-generate its build system." }
 };
 
 const cmDocumentationEntry cmDocumentationUsageNote = {
-  nullptr, "Run 'cmake --help' for more information."
+  {},
+  "Run 'cmake --help' for more information."
 };
 
 const cmDocumentationEntry cmDocumentationOptions[31] = {