Merge pull request #2680 from patricklodder/1.14.6-cfgac-format

trivial: fix spacing issues in configure.ac

configure.ac

@@ -1186,7 +1186,7 @@ case ${OS} in
    ;;
 esac
 
-echo 
+echo
 echo "Options used to compile and link:"
 echo "  with wallet   = $enable_wallet"
 echo "  with gui / qt = $bitcoin_enable_qt"
@@ -1200,7 +1200,7 @@ echo "  with bench    = $use_bench"
 echo "  with upnp     = $use_upnp"
 echo "  debug enabled = $enable_debug"
 echo "  werror        = $enable_werror"
-echo 
+echo
 echo "  target os     = $TARGET_OS"
 echo "  build os      = $BUILD_OS"
 echo
@@ -1210,4 +1210,4 @@ echo "  CPPFLAGS      = $CPPFLAGS"
 echo "  CXX           = $CXX"
 echo "  CXXFLAGS      = $CXXFLAGS"
 echo "  LDFLAGS       = $LDFLAGS"
-echo 
+echo