In commit 8ed03baa76 (gitattributes: prefer `eol=crlf` to `-crlf`,
2017-08-23) we left a few CRLF blobs in the repository. Some Git
versions get confused by text files with CRLF blobs. Convert them
to LF blobs. Use the `eol=crlf` attribute to tell Git to use CRLF
on checkout.
Teach the CMake language parser to recognize Lua-style "long bracket"
arguments. These start with two '[' separated by zero or more '='
characters e.g. "[[" or "[=[" or "[==[". They end with two ']'
separated by the same number of '=' as the opening bracket. There is no
nesting of brackets of the same level (number of '='). No escapes,
variable expansion, or other processing is performed on the content
between such brackets so they always represent exactly one argument.
Also teach CMake to parse and ignore "long comment" syntax. A long
comment starts with "#" immediately followed by an opening long bracket.
It ends at the matching close long bracket.
Teach the RunCMake.Syntax test to cover long bracket and long comment
cases.
