fix occurrences of occur[^sr .,?!;\n]

R=r, r2
CC=golang-dev
https://golang.org/cl/3794043

src/pkg/exp/datafmt/datafmt.go

@@ -656,7 +656,7 @@ func (s *State) eval(fexpr expr, value reflect.Value, index int) bool {
 
 // Eval formats each argument according to the format
 // f and returns the resulting []byte and os.Error. If
-// an error occured, the []byte contains the partially
+// an error occurred, the []byte contains the partially
 // formatted result. An environment env may be passed
 // in which is available in custom formatters through
 // the state parameter.

src/pkg/go/parser/interface.go

@@ -178,7 +178,7 @@ func ParseFiles(fset *token.FileSet, filenames []string, mode uint) (pkgs map[st
 // information is recorded in the file set fset.
 //
 // If the directory couldn't be read, a nil map and the respective error are
-// returned. If a parse error occured, a non-nil but incomplete map and the
+// returned. If a parse error occurred, a non-nil but incomplete map and the
 // error are returned.
 //
 func ParseDir(fset *token.FileSet, path string, filter func(*os.FileInfo) bool, mode uint) (map[string]*ast.Package, os.Error) {

src/pkg/go/printer/printer.go

@@ -879,7 +879,7 @@ func (p *printer) commentBefore(next token.Position) bool {
 }
 
 
-// Flush prints any pending comments and whitespace occuring
+// Flush prints any pending comments and whitespace occurring
 // textually before the position of the next token tok. Flush
 // returns true if a pending formfeed character was dropped
 // from the whitespace buffer as a result of interspersing
@@ -922,7 +922,7 @@ const (
 )
 
 
-// Design note: It is tempting to eliminate extra blanks occuring in
+// Design note: It is tempting to eliminate extra blanks occurring in
 //              whitespace in this function as it could simplify some
 //              of the blanks logic in the node printing functions.
 //              However, this would mess up any formatting done by

src/pkg/index/suffixarray/suffixarray_test.go

@@ -101,11 +101,11 @@ var testCases = []testCase{
 }
 
 
-// find all occurences of s in source; report at most n occurences
+// find all occurrences of s in source; report at most n occurences
 func find(src, s string, n int) []int {
 	var res vector.IntVector
 	if s != "" && n != 0 {
-		// find at most n occurences of s in src
+		// find at most n occurrences of s in src
 		for i := -1; n < 0 || len(res) < n; {
 			j := strings.Index(src[i+1:], s)
 			if j < 0 {