go/analysis: fix typos

Change-Id: I07235ffba66bf0f7ef0e1917c6f711d317c9ae02
Reviewed-on: https://go-review.googlesource.com/c/tools/+/194139
Reviewed-by: Toshihiro Shiino <shiino.toshihiro@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

go/analysis/internal/facts/facts.go

@@ -29,7 +29,7 @@
 // The notion of "exportedness" that matters here is that of the
 // compiler. According to the language spec, a method pkg.T.f is
 // unexported simply because its name starts with lowercase. But the
-// compiler must nonethless export f so that downstream compilations can
+// compiler must nonetheless export f so that downstream compilations can
 // accurately ascertain whether pkg.T implements an interface pkg.I
 // defined as interface{f()}. Exported thus means "described in export
 // data".

go/analysis/passes/cgocall/cgocall.go

@@ -107,7 +107,7 @@ func checkCgo(fset *token.FileSet, f *ast.File, info *types.Info, reportf func(t
 // cgo files of a package (those that import "C"). Such files are not
 // Go, so there may be gaps in type information around C.f references.
 //
-// This checker was initially written in vet to inpect raw cgo source
+// This checker was initially written in vet to inspect raw cgo source
 // files using partial type information. However, Analyzers in the new
 // analysis API are presented with the type-checked, "cooked" Go ASTs
 // resulting from cgo-processing files, so we must choose between
@@ -133,7 +133,7 @@ func checkCgo(fset *token.FileSet, f *ast.File, info *types.Info, reportf func(t
 //	func (T) f(int) string { ... }
 //
 // we synthesize a new ast.File, shown below, that dot-imports the
-// orginal "cooked" package using a special name ("·this·"), so that all
+// original "cooked" package using a special name ("·this·"), so that all
 // references to package members resolve correctly. (References to
 // unexported names cause an "unexported" error, which we ignore.)
 //

go/analysis/passes/errorsas/errorsas.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// The errorsas package defines an Analyzer that checks that the second arugment to
+// The errorsas package defines an Analyzer that checks that the second argument to
 // errors.As is a pointer to a type implementing error.
 package errorsas
 

go/analysis/validate.go

@@ -10,7 +10,7 @@ import (
 // Checks include:
 // that the name is a valid identifier;
 // that analyzer names are unique;
-// that the Requires graph is acylic;
+// that the Requires graph is acyclic;
 // that analyzer fact types are unique;
 // that each fact type is a pointer.
 func Validate(analyzers []*Analyzer) error {