Utilities/Release: Use ${VAR} instead of @VAR@ syntax

The Utilities/Release/Cygwin/CMakeLists.txt is processed in the project,
not configured, so we should avoid using @-replacement syntax.
tests: Remove the edits to RunCMake.cmake
tests: Rename Bracket3 to Unquoted2
tests: Rename the EscapeCharsDisallowed generated tests
EVIS: Improve invalid escape character error
tests: Update trailing '\' expected output
EVIS: update error message
Merge topic 'dev/faster-evis' into next

be2d73af EVIS: update error message
751c5d71 tests: Update trailing '\' expected output
ea5fb2db EVIS: Improve invalid escape character error
5de8baa7 tests: Rename the EscapeCharsDisallowed generated tests
5e60e0bb tests: Rename Bracket3 to Unquoted2
a3b0411b tests: Remove the edits to RunCMake.cmake
aa5400e1 Utilities/Release: Use ${VAR} instead of @VAR@ syntax