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    <head>
      <base href="https://bugs.llvm.org/">
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - clang-format sorts headers even when /* clang-format off */ is used"
   href="https://bugs.llvm.org/show_bug.cgi?id=39646">39646</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>clang-format sorts headers even when /* clang-format off */ is used
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>7.0
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Macintosh
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>MacOS X
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Formatter
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedclangbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>nick.randall@booking.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>djasper@google.com, klimek@google.com, llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>When files include "/* clang-format off */" right at the top, this is ignored
and headers are sorted anyway.

Changing this instead to "// clang-format off" makes it work as expected and
not sort the headers.

Looking through Format.cpp, in sortCppIncludes, there is an explicit check for
"// clang-format off" but not the former version, when both should work. 


Formatting is disabled as expected:

// clang-format off
#include "b.h"
#include "a.h"


Formatting re-orders headers when it shouldn't:

/* clang-format off */
#include "b.h"
#include "a.h"   <- these will be sorted</pre>
        </div>
      </p>


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