[PATCH] cpp11-migrate: Docs refresh

[Ariel Bernal]

  LGTM


================
Comment at: docs/MigratorUsage.rst:10
@@ +9,3 @@
+
+If the ``-p`` option is not specified, ``--`` is required. Compiler
+arguments required to compile the source file, if any, are placed after
----------------
Maybe  some brief explanation of -p //If the build path option "-p" is not specified...// or something like that?

================
Comment at: docs/MigratorUsage.rst:76
@@ +75,3 @@
+  apply each transform is recorded by the migrator and written in JSON format
+  to a uniquely named file in the given ``<directory>``. All sources processed
+  by a single Migrator process are written to the same output file.
----------------
May be noting that if directory is not specified after -perf the default value would be ./migrate_perf.


http://llvm-reviews.chandlerc.com/D927