Fix nits

Author: petk

cmake/cmake/modules/FindRE2C.cmake

@@ -62,7 +62,7 @@ re2c_target(
 * `<input>` - The re2c template file input. Relative source file path is
   interpreted as being relative to the current source directory.
 * `<output>` - The output file. Relative output file path is interpreted as
-  being relative to the current source directory.
+  being relative to the current binary directory.
 * `HEADER` - Generate a <header> file. Relative header file path is interpreted
   as being relative to the current binary directory.
 * `OPTIONS` - List of additional options to pass to re2c command-line tool.

cmake/cmake/modules/PHP/ConfigureFile.cmake

@@ -18,10 +18,15 @@ php_configure_file(
 )
 ```
 
-* `VARIABLES`
+* `INPUT` or `CONTENT` specify the input template (either a file or a content
+  string). Relative <template-file> is interpreted as being relative to the
+  current source directory.
 
-  Pairs of variable names and values. Variable values support generator
-  expressions.
+* `OUTPUT` specifies the output file. Relative file path is interpreted as being
+  relative to the current binary directory.
+
+* `VARIABLES` represent the pairs of variable names and values. Variable values
+  support generator expressions.
 
   The `$<INSTALL_PREFIX>` generator expression can be used in variable values,
   which is replaced with installation prefix either set via the
@@ -155,6 +160,12 @@ function(php_configure_file)
       "${CMAKE_CURRENT_FUNCTION} expects either INPUT or CONTENT keyword to "
       "specify template."
     )
+  elseif(parsed_INPUT AND parsed_CONTENT)
+    message(
+      FATAL_ERROR
+      "${CMAKE_CURRENT_FUNCTION} requires either INPUT or CONTENT keyword. To "
+      "specify input template only one is required."
+    )
   endif()
 
   if(NOT parsed_OUTPUT)