all: remove unnecessary symbols and add missing symbols

Change-Id: I535a7aaaf3f9e8a9c0e0c04f8f745ad7445a32f7
Reviewed-on: https://go-review.googlesource.com/c/go/+/611678
Run-TryBot: shuang cui <imcusg@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>

src/cmd/compile/internal/inline/inlheur/scoring.go

@@ -369,7 +369,7 @@ func setupFlagToAdjMaps() {
 // "call in loop". If the calculated cost of the function is 150, and
 // the in-loop adjustment is 5 (for example), then there is not much
 // point treating it as inlinable. On the other hand "bar" has a param
-// property (parameter "x" feeds unmodified to an "if" statement") and
+// property (parameter "x" feeds unmodified to an "if" statement) and
 // a return property (always returns same constant) meaning that a
 // given call _could_ be rescored down as much as -35 points-- thus if
 // the size of "bar" is 100 (for example) then there is at least a

src/cmd/compile/internal/syntax/printer.go

@@ -931,7 +931,7 @@ func (p *printer) printParameterList(list []*Field, tok token) {
 // combinesWithName reports whether a name followed by the expression x
 // syntactically combines to another valid (value) expression. For instance
 // using *T for x, "name *T" syntactically appears as the expression x*T.
-// On the other hand, using  P|Q or *P|~Q for x, "name P|Q" or name *P|~Q"
+// On the other hand, using  P|Q or *P|~Q for x, "name P|Q" or "name *P|~Q"
 // cannot be combined into a valid (value) expression.
 func combinesWithName(x Expr) bool {
 	switch x := x.(type) {

src/cmd/compile/internal/types2/compiler_internal.go

@@ -15,7 +15,7 @@ import (
 // does not have a name and if the result in the signature also does not have a name,
 // then the signature and field are renamed to
 //
-//	fmt.Sprintf("#rv%d", i+1)`
+//	fmt.Sprintf("#rv%d", i+1)
 //
 // the newly named object is inserted into the signature's scope,
 // and the object and new field name are returned.

src/cmd/go/internal/vcs/discovery.go

@@ -86,7 +86,7 @@ func parseMetaGoImports(r io.Reader, mod ModuleMode) ([]metaImport, error) {
 }
 
 // attrValue returns the attribute value for the case-insensitive key
-// `name', or the empty string if nothing is found.
+// `name`, or the empty string if nothing is found.
 func attrValue(attrs []xml.Attr, name string) string {
 	for _, a := range attrs {
 		if strings.EqualFold(a.Name.Local, name) {

src/cmd/internal/dwarf/dwarf.go

@@ -31,7 +31,7 @@ const ConstInfoPrefix = "go:constinfo."
 // populate the DWARF compilation unit info entries.
 const CUInfoPrefix = "go:cuinfo."
 
-// Used to form the symbol name assigned to the DWARF 'abstract subprogram"
+// Used to form the symbol name assigned to the DWARF "abstract subprogram"
 // info entry for a function
 const AbstractFuncSuffix = "$abstract"
 

src/cmd/internal/src/pos.go

@@ -127,7 +127,7 @@ func (p Pos) String() string {
 // Format formats a position as "filename:line" or "filename:line:column",
 // controlled by the showCol flag and if the column is known (!= 0).
 // For positions relative to line directives, the original position is
-// shown as well, as in "filename:line[origfile:origline:origcolumn] if
+// shown as well, as in "filename:line[origfile:origline:origcolumn]" if
 // showOrig is set.
 func (p Pos) Format(showCol, showOrig bool) string {
 	buf := new(bytes.Buffer)

src/go/build/deps_test.go

@@ -32,7 +32,7 @@ import (
 //
 // "a < b" means package b can import package a.
 //
-// See `go doc internal/dag' for the full syntax.
+// See `go doc internal/dag` for the full syntax.
 //
 // All-caps names are pseudo-names for specific points
 // in the dependency lattice.

src/go/printer/nodes.go

@@ -401,7 +401,7 @@ func (p *printer) parameters(fields *ast.FieldList, mode paramMode) {
 // combinesWithName reports whether a name followed by the expression x
 // syntactically combines to another valid (value) expression. For instance
 // using *T for x, "name *T" syntactically appears as the expression x*T.
-// On the other hand, using  P|Q or *P|~Q for x, "name P|Q" or name *P|~Q"
+// On the other hand, using  P|Q or *P|~Q for x, "name P|Q" or "name *P|~Q"
 // cannot be combined into a valid (value) expression.
 func combinesWithName(x ast.Expr) bool {
 	switch x := x.(type) {

src/math/big/ftoa.go

@@ -309,7 +309,7 @@ func fmtF(buf []byte, prec int, d decimal) []byte {
 }
 
 // fmtB appends the string of x in the format mantissa "p" exponent
-// with a decimal mantissa and a binary exponent, or 0" if x is zero,
+// with a decimal mantissa and a binary exponent, or "0" if x is zero,
 // and returns the extended buffer.
 // The mantissa is normalized such that is uses x.Prec() bits in binary
 // representation.

src/time/zoneinfo_windows.go

@@ -20,7 +20,7 @@ var platformZoneSources []string // none: Windows uses system calls instead
 // time apply to all previous and future years as well.
 
 // matchZoneKey checks if stdname and dstname match the corresponding key
-// values "MUI_Std" and MUI_Dlt" or "Std" and "Dlt" in the kname key stored
+// values "MUI_Std" and "MUI_Dlt" or "Std" and "Dlt" in the kname key stored
 // under the open registry key zones.
 func matchZoneKey(zones registry.Key, kname string, stdname, dstname string) (matched bool, err2 error) {
 	k, err := registry.OpenKey(zones, kname, registry.READ)