In markdown a single backtick around a term says to format it as
fixed-width text, e.g., `fixed-width text`. The rst language uses
double back-ticks, e.g., ``fixed-width text``.
Fix misuses of single backtick in our documentation.
Signed-off-by: David B. Kinder <david.b.kinder@intel.com>
983f4b90c2