Help/manual: Avoid long lines in code blocks

Update the wording of some examples to avoid long lines in code blocks.
Otherwise the formatted documentation can exceed certain column width
limitations.

Help/manual/cmake-compile-features.7.rst

@@ -276,10 +276,13 @@ properties:
 .. code-block:: cmake
 
   add_library(foo INTERFACE)
+  set(with_variadics ${CMAKE_CURRENT_SOURCE_DIR}/with_variadics)
+  set(no_variadics ${CMAKE_CURRENT_SOURCE_DIR}/no_variadics)
   target_link_libraries(foo
     INTERFACE
-      "$<$<COMPILE_FEATURES:cxx_variadic_templates>:${CMAKE_CURRENT_SOURCE_DIR}/with_variadics>"
-      "$<$<NOT:$<COMPILE_FEATURES:cxx_variadic_templates>>:${CMAKE_CURRENT_SOURCE_DIR}/no_variadics>")
+      "$<$<COMPILE_FEATURES:cxx_variadic_templates>:${with_variadics}>"
+      "$<$<NOT:$<COMPILE_FEATURES:cxx_variadic_templates>>:${no_variadics}>"
+    )
 
 Consuming code then simply links to the ``foo`` target as usual and uses
 the feature-appropriate include directory

Help/manual/cmake-developer.7.rst

@@ -1005,7 +1005,8 @@ projects that do not require a high enough CMake version.
 .. code-block:: cmake
 
   if(CMAKE_MINIMUM_REQUIRED_VERSION VERSION_LESS 3.0.0)
-    message(AUTHOR_WARNING "Your project should require at least CMake 3.0.0 to use FindFoo.cmake")
+    message(AUTHOR_WARNING
+      "Your project should require at least CMake 3.0.0 to use FindFoo.cmake")
   endif()
 
 Now the actual libraries and so on have to be found.  The code here will

Help/manual/cmake-generator-expressions.7.rst

@@ -38,6 +38,8 @@ create conditional output::
 expands to ``DEBUG_MODE`` when the ``Debug`` configuration is used, and
 otherwise expands to nothing.
 
+Available logical expressions are:
+
 ``$<0:...>``
   Empty string (ignores ``...``)
 ``$<1:...>``
@@ -111,6 +113,8 @@ expands to ``OLD_COMPILER`` if the
 :variable:`CMAKE_CXX_COMPILER_VERSION <CMAKE_<LANG>_COMPILER_VERSION>` is less
 than 4.2.0.
 
+Available informational expressions are:
+
 ``$<CONFIGURATION>``
   Configuration name. Deprecated. Use ``CONFIG`` instead.
 ``$<CONFIG>``
@@ -185,7 +189,13 @@ property with each entry preceeded by ``-I``. Note that a more-complete use
 in this situation would require first checking if the INCLUDE_DIRECTORIES
 property is non-empty::
 
-  $<$<BOOL:$<TARGET_PROPERTY:INCLUDE_DIRECTORIES>>:-I$<JOIN:$<TARGET_PROPERTY:INCLUDE_DIRECTORIES>, -I>>
+  $<$<BOOL:${prop}>:-I$<JOIN:${prop}, -I>>
+
+where ``${prop}`` refers to a helper variable::
+
+  set(prop "$<TARGET_PROPERTY:INCLUDE_DIRECTORIES>")
+
+Available output expressions are:
 
 ``$<JOIN:list,...>``
   Joins the list with the content of ``...``

Help/manual/cmake-toolchains.7.rst

@@ -115,8 +115,9 @@ as:
   set(CMAKE_SYSROOT /home/devel/rasp-pi-rootfs)
   set(CMAKE_STAGING_PREFIX /home/devel/stage)
 
-  set(CMAKE_C_COMPILER /home/devel/gcc-4.7-linaro-rpi-gnueabihf/bin/arm-linux-gnueabihf-gcc)
-  set(CMAKE_CXX_COMPILER /home/devel/gcc-4.7-linaro-rpi-gnueabihf/bin/arm-linux-gnueabihf-g++)
+  set(tools /home/devel/gcc-4.7-linaro-rpi-gnueabihf)
+  set(CMAKE_C_COMPILER ${tools}/bin/arm-linux-gnueabihf-gcc)
+  set(CMAKE_CXX_COMPILER ${tools}/bin/arm-linux-gnueabihf-g++)
 
   set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
   set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)