do not escape spaces in regular expressions

The space has no special meaning in regular expressions so it doesn't need to
be escaped.

Docs/bash-completion/cpack

@@ -8,7 +8,7 @@ _cpack()
     case "$prev" in
         -G)
             COMPREPLY=( $( compgen -W '$( cpack --help 2>/dev/null |
-                grep "^  .*=\ .*" 2> /dev/null | grep -v "^  -" 2>/dev/null |
+                grep "^  .*= .*" 2> /dev/null | grep -v "^  -" 2>/dev/null |
                 cut -d" " -f 3 )' -- "$cur" ) )
             return
             ;;

Modules/CPackRPM.cmake

@@ -259,7 +259,7 @@ if(RPMBUILD_EXECUTABLE)
                   OUTPUT_VARIABLE _TMP_VERSION
                   ERROR_QUIET
                   OUTPUT_STRIP_TRAILING_WHITESPACE)
-  string(REGEX REPLACE "^.*\ " ""
+  string(REGEX REPLACE "^.* " ""
          RPMBUILD_EXECUTABLE_VERSION
          ${_TMP_VERSION})
   if(CPACK_RPM_PACKAGE_DEBUG)

Modules/FindArmadillo.cmake

@@ -64,7 +64,7 @@ if(ARMADILLO_INCLUDE_DIR)
     string(REGEX REPLACE ".*#define ARMA_VERSION_PATCH ([0-9]+).*" "\\1" ARMADILLO_VERSION_PATCH "${_armadillo_HEADER_CONTENTS}")
 
     # WARNING: The number of spaces before the version name is not one.
-    string(REGEX REPLACE ".*#define ARMA_VERSION_NAME\ +\"([0-9a-zA-Z\ _-]+)\".*" "\\1" ARMADILLO_VERSION_NAME "${_armadillo_HEADER_CONTENTS}")
+    string(REGEX REPLACE ".*#define ARMA_VERSION_NAME +\"([0-9a-zA-Z _-]+)\".*" "\\1" ARMADILLO_VERSION_NAME "${_armadillo_HEADER_CONTENTS}")
 
   endif()