Don't mention -fno-diagnostics-print-source-range-info in manual.

Clang doesn't understand it.

If someone wants to teach clang about that flag instead, please also add
support for -fno-diagnostics-parseable-fixits for consistency.

Until then, let the documentation match the current behavior.

llvm-svn: 171952
diff --git a/clang/docs/UsersManual.rst b/clang/docs/UsersManual.rst
index 1c6e967..eb17eed 100644
--- a/clang/docs/UsersManual.rst
+++ b/clang/docs/UsersManual.rst
@@ -334,13 +334,12 @@
 
 .. _opt_fdiagnostics-print-source-range-info:
 
-**-f[no-]diagnostics-print-source-range-info**
+**-fdiagnostics-print-source-range-info**
    Print machine parsable information about source ranges.
-   This option, which defaults to off, controls whether or not Clang
-   prints information about source ranges in a machine parsable format
-   after the file/line/column number information. The information is a
-   simple sequence of brace enclosed ranges, where each range lists the
-   start and end line/column locations. For example, in this output:
+   This option makes Clang print information about source ranges in a machine
+   parsable format after the file/line/column number information. The
+   information is a simple sequence of brace enclosed ranges, where each range
+   lists the start and end line/column locations. For example, in this output:
 
    ::