Changed default from 1 to 0; fixed typo

Author: MikeSpreitzer

keps/sig-api-machinery/1040-priority-and-fairness/README.md

@@ -740,14 +740,14 @@ the dispatching for non-exempt priority levels.
 
 At the same time, the relevant new datatype was added.  It is shown
 below.  The default number of nominal concurrency shares is set to the
-minimal value (i.e., 1) so as to minimize disruption as this feature
+minimal value (i.e., 0) so as to minimize disruption as this feature
 is rolled into existing clusters; authorized administrators can choose
 to set it higher.
 
 ```go
 // ExemptPriorityLevelConfiguration describes the configurable aspects
 // of the handling of exempt requests.
-// In the mandatory exemp configuration object the values in the fields
+// In the mandatory exempt configuration object the values in the fields
 // here can be modified by authorized users, unlike the rest of the `spec`.
 type ExemptPriorityLevelConfiguration struct {
   // `nominalConcurrencyShares` (NCS) contributes to the computation of the
@@ -763,7 +763,7 @@ type ExemptPriorityLevelConfiguration struct {
   //
   // Bigger numbers mean a larger nominal concurrency limit,
   // at the expense of every other Limited priority level.
-  // This field has a default value of 1.
+  // This field has a default value of zero.
   // +optional
   NominalConcurrencyShares int32