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/cmake.cxx b/Source/cmake.cxx
index f176cc1..589ef1f 100644
--- a/Source/cmake.cxx
+++ b/Source/cmake.cxx
@@ -1229,10 +1229,12 @@ int cmake::HandleDeleteCacheVariables(const std::string& var)
     }
   std::vector<SaveCacheEntry> saved;
   std::ostringstream warning;
+  /* clang-format off */
   warning
     << "You have changed variables that require your cache to be deleted.\n"
     << "Configure will be re-run and you may have to reset some variables.\n"
     << "The following variables have changed:\n";
+  /* clang-format on */
   for(std::vector<std::string>::iterator i = argsSplit.begin();
       i != argsSplit.end(); ++i)
     {