Fix typos and remove an unnecessary conditional (uber-go#519)

Fix two misspellings in the documentation and remove an unnecessary conditional.

field.go

@@ -210,7 +210,7 @@ func Object(key string, val zapcore.ObjectMarshaler) zapcore.Field {
 // necessary.
 //
 // Since byte/uint8 and rune/int32 are aliases, Any can't differentiate between
-// them. To minimize suprise, []byte values are treated as binary blobs, byte
+// them. To minimize surprises, []byte values are treated as binary blobs, byte
 // values are treated as uint8, and runes are always treated as integers.
 func Any(key string, value interface{}) zapcore.Field {
 	switch val := value.(type) {

internal/readme/readme.go

@@ -68,10 +68,7 @@ func do() error {
 	if err != nil {
 		return err
 	}
-	if err := t.Execute(os.Stdout, tmplData); err != nil {
-		return err
-	}
-	return nil
+	return t.Execute(os.Stdout, tmplData)
 }
 
 func getTmplData() (*tmplData, error) {

level.go

@@ -78,7 +78,7 @@ func NewAtomicLevel() AtomicLevel {
 	}
 }
 
-// NewAtomicLevelAt is a convienence function that creates an AtomicLevel
+// NewAtomicLevelAt is a convenience function that creates an AtomicLevel
 // and then calls SetLevel with the given level.
 func NewAtomicLevelAt(l zapcore.Level) AtomicLevel {
 	a := NewAtomicLevel()