Help/add_custom_command: Add synopsis and signatures

Help/manual/cmake-instrumentation.7.rst

@@ -383,9 +383,9 @@ Snippet files have a filename with the syntax
   ``target``
     The CMake target associated with the command. Only included when ``role``
     is ``compile`` or ``link``, or when ``role`` is ``custom`` and the custom
-    command is attached to a target with :ref:`add_custom_command(TARGET)`. In
-    conjunction with ``cmakeContent``, this can be used to look up the target
-    :prop_tgt:`TYPE` and :prop_tgt:`LABELS`.
+    command is attached to a target with :command:`add_custom_command(TARGET)`.
+    In conjunction with ``cmakeContent``, this can be used to look up the
+    target :prop_tgt:`TYPE` and :prop_tgt:`LABELS`.
 
   ``timeStart``
     Time at which the command started, expressed as the number of milliseconds

Help/release/3.21.rst

@@ -98,7 +98,6 @@ Commands
   * is now supported by the :generator:`Xcode` generator.
 
 * The :command:`add_custom_command(TARGET)` command
-  (for :ref:`Build Events <add_custom_command(TARGET)>`)
   gained support for resolving target-dependent generator expressions.
 
 * The :command:`build_command` command gained a ``PARALLEL_LEVEL`` option.

Help/release/3.29.rst

@@ -50,7 +50,7 @@ Compilers
 Commands
 --------
 
-* The :ref:`add_custom_command(TARGET) <add_custom_command(TARGET)>`
+* The :command:`add_custom_command(TARGET)`
   signature now supports adding build events through :ref:`Alias Targets`.
 
 * The :command:`cmake_language(EXIT)` sub-command was added to terminate