Isolate formatted streaming blocks with clang-format off/on

The clang-format tool can do a good job formatting most code, but
well-organized streaming blocks are best left manually formatted.

Find blocks of the form

    os <<
      "...\n"
      "...\n"
      ;

using the command

    $ git ls-files -z -- Source |
      egrep -v -z '^Source/kwsys/' |
      xargs -0 pcregrep -M --color=always -B 1 -A 1 -n \
        '<<[^\n]*\n(^ *("[^\n]*("|<<|;)$|;)\n){2,}'

Find blocks of the form

    os << "...\n"
       << "...\n"
       << "...\n";

using the command

    $ git ls-files -z -- Source |
      egrep -v -z '^Source/kwsys/' |
      xargs -0 pcregrep -M --color=always -B 1 -A 1 -n \
        '<<[^\n]*\n(^ *<<[^\n]*(\\n"|<<|;)$\n){2,}'

Surround such blocks with the pair

    /* clang-format off */
    ...
    /* clang-format on */

in order to protect them from update by clang-format.  Use the C-style
`/*...*/` comments instead of C++-style `//...` comments in order to
prevent them from ever being swallowed by re-formatting of surrounding
comments.

1 files changed, 2 insertions, 0 deletions

diff --git a/Source/cmGlobalJOMMakefileGenerator.cxx b/Source/cmGlobalJOMMakefileGenerator.cxx
index 31cd2d3..aeb7dd5 100644
--- a/Source/cmGlobalJOMMakefileGenerator.cxx
+++ b/Source/cmGlobalJOMMakefileGenerator.cxx
@@ -55,11 +55,13 @@ void cmGlobalJOMMakefileGenerator::PrintCompilerAdvice(std::ostream& os,
 {
   if(lang == "CXX" || lang == "C")
     {
+    /* clang-format off */
     os <<
       "To use the JOM generator with Visual C++, cmake must be run from a "
       "shell that can use the compiler cl from the command line. This "
       "environment is unable to invoke the cl compiler. To fix this problem, "
       "run cmake from the Visual Studio Command Prompt (vcvarsall.bat).\n";
+    /* clang-format on */
     }
   this->cmGlobalUnixMakefileGenerator3::PrintCompilerAdvice(os, lang, envVar);
 }